This document provides training materials for an OPAL Tree Health Survey. It introduces common tree pests and diseases found in the UK and provides guidance on conducting the survey. Trainees are taught to identify 18 specific pests and diseases that affect oak, ash, horse chestnut and other tree species through descriptions and photographs. The survey involves examining trees for signs of these pests/diseases and recording observations. Public participation in the survey will aid understanding of impacts on Britain's trees and help manage the spread of pests and diseases.
The document discusses the oak wilt fungus, one of the most destructive tree diseases in the United States. It kills oak trees in central Texas in epidemic proportions. It is caused by the fungus Bretziella fagacearum and is present in over 20 eastern and midwestern states. In Texas it is found in 76 central and west Texas counties and was first identified in Dallas in 1961. It impacts both rural and urban areas by reducing property values and destroying thousands of acres of live oaks. The document provides information on the fungus, how it spreads, symptoms, identification, and management strategies like prevention, trenching, and injection.
Fungal attack can cause damage to wood by feeding on its cells, softening and decaying the wood over time. Fungi need moisture levels above 20%, a food supply like wood, and oxygen to grow. The life cycle of wood rotting fungi involves spores spreading via wind, insects, animals or humans and germinating on wood if conditions are suitable, growing into a mycelium network and producing more spores to spread the fungus. There are two main types of wood rot caused by fungi - wet rot which affects wood above 40% moisture content, usually outdoors, and dry rot which occurs indoors in damp areas with poor ventilation. Preventing fungal attack involves keeping moisture levels below 20% and
Fungal spores can infect timber, causing rot and decay. Fungi feed on the cells of wood and require moisture, food, oxygen, and warmth to survive. There are two main types of fungal rot: wet rot, which affects wood with over 40% moisture and causes a burned appearance; and dry rot, which eats cellulose and favors damp, dark environments. To remedy an infection, infected wood is removed and burned while surrounding areas are treated with fungicide and preservative. The source of dampness must also be identified and fixed to prevent future attacks.
White pine blister rust is a fungal disease that requires both white pines and species of currants and gooseberries to complete its lifecycle. It was introduced from Europe in the 1890s and can cause defoliation, death of white pines, and was declared a public nuisance in some states. The disease spreads via spores from ribes plants to pine needles and causes needle discoloration, flagging branches, trunk cankers, and decay. Monitoring, improving tree health, removing ribes plants, and bark tracing can help manage the disease.
This document provides information on managing lawn insects through integrated pest management. It discusses how proper cultural practices like choosing appropriate grass varieties, proper irrigation, fertilization, mowing, and thatch removal are the primary methods for managing insect damage and keeping lawns healthy. Only a few insect species like billbugs, chinch bugs, and white grubs occasionally damage lawns in significant numbers and require treatment. The document describes identifying features of common lawn pests and their signs of damage to help determine if insects are the cause of any lawn problems.
"Custom Weed & Pest Control has been in business since 1989, serving the greater Phoenix metro area for both residential and commercial. We offer organic, natural and chemical pest control, customizing our service to your specific needs.
Visit site: http://wekillweeds.com
Custom Weed & Pest Control
Address: Phoenix AZ 85044
Phone: 602-956-3844
Fax: 623-376-7743
Email: info@wekillweeds.com"
This document discusses various types of wood rot and insect damage that can occur in buildings. It describes the characteristics and typical damage caused by dry rot fungus, wet rot (brown and white rot), molds, blue stain, plaster fungi, and many wood-boring beetles and insects. The document provides images to illustrate the fungi, insects, bore dust, and damage seen in wood. It concludes with notes on remedial treatments for fungi and insect infestations, as well as safety aspects.
The document discusses the oak wilt fungus, one of the most destructive tree diseases in the United States. It kills oak trees in central Texas in epidemic proportions. It is caused by the fungus Bretziella fagacearum and is present in over 20 eastern and midwestern states. In Texas it is found in 76 central and west Texas counties and was first identified in Dallas in 1961. It impacts both rural and urban areas by reducing property values and destroying thousands of acres of live oaks. The document provides information on the fungus, how it spreads, symptoms, identification, and management strategies like prevention, trenching, and injection.
Fungal attack can cause damage to wood by feeding on its cells, softening and decaying the wood over time. Fungi need moisture levels above 20%, a food supply like wood, and oxygen to grow. The life cycle of wood rotting fungi involves spores spreading via wind, insects, animals or humans and germinating on wood if conditions are suitable, growing into a mycelium network and producing more spores to spread the fungus. There are two main types of wood rot caused by fungi - wet rot which affects wood above 40% moisture content, usually outdoors, and dry rot which occurs indoors in damp areas with poor ventilation. Preventing fungal attack involves keeping moisture levels below 20% and
Fungal spores can infect timber, causing rot and decay. Fungi feed on the cells of wood and require moisture, food, oxygen, and warmth to survive. There are two main types of fungal rot: wet rot, which affects wood with over 40% moisture and causes a burned appearance; and dry rot, which eats cellulose and favors damp, dark environments. To remedy an infection, infected wood is removed and burned while surrounding areas are treated with fungicide and preservative. The source of dampness must also be identified and fixed to prevent future attacks.
White pine blister rust is a fungal disease that requires both white pines and species of currants and gooseberries to complete its lifecycle. It was introduced from Europe in the 1890s and can cause defoliation, death of white pines, and was declared a public nuisance in some states. The disease spreads via spores from ribes plants to pine needles and causes needle discoloration, flagging branches, trunk cankers, and decay. Monitoring, improving tree health, removing ribes plants, and bark tracing can help manage the disease.
This document provides information on managing lawn insects through integrated pest management. It discusses how proper cultural practices like choosing appropriate grass varieties, proper irrigation, fertilization, mowing, and thatch removal are the primary methods for managing insect damage and keeping lawns healthy. Only a few insect species like billbugs, chinch bugs, and white grubs occasionally damage lawns in significant numbers and require treatment. The document describes identifying features of common lawn pests and their signs of damage to help determine if insects are the cause of any lawn problems.
"Custom Weed & Pest Control has been in business since 1989, serving the greater Phoenix metro area for both residential and commercial. We offer organic, natural and chemical pest control, customizing our service to your specific needs.
Visit site: http://wekillweeds.com
Custom Weed & Pest Control
Address: Phoenix AZ 85044
Phone: 602-956-3844
Fax: 623-376-7743
Email: info@wekillweeds.com"
This document discusses various types of wood rot and insect damage that can occur in buildings. It describes the characteristics and typical damage caused by dry rot fungus, wet rot (brown and white rot), molds, blue stain, plaster fungi, and many wood-boring beetles and insects. The document provides images to illustrate the fungi, insects, bore dust, and damage seen in wood. It concludes with notes on remedial treatments for fungi and insect infestations, as well as safety aspects.
The document discusses mango dieback caused by the fungus Lasiodiplodia theobromae. It affects mango crops in India, Nepal, China, and other countries. The fungus overwinters in pycnidia on diseased wood and releases spores during rainy weather which infect wounds on trees, causing cankers and dieback. Management includes pruning outside of rainy seasons, minimizing wounds, and applying fungicide to pruned areas to control the spread of the disease.
Turf grass diseases, symptoms and controlAnusha Babooa
This document discusses common turf grass diseases, their symptoms, and methods of control. It describes several fungal and bacterial diseases that affect cool-season and warm-season turf grasses, including anthracnose, brown patch, dollar spot, fairy rings, powdery mildew, Pythium blight, red thread, rust, and white patch. For each disease, it provides details on the causal pathogen, affected host plants, symptoms, and recommended control strategies involving fungicides, cultural practices, and environmental management.
This document provides information on types of defects that can occur in timber used as a construction material. It discusses defects that can arise from natural forces like wind, fungi, insects, and during the seasoning and conversion processes. Specific defects described include wind cracks, shakes, twisted fibers, upsets, rind galls, burls, water stain, chemical stain, dead wood, knots, coarse grain, foxiness, and druxiness. Defects that can occur during seasoning such as bowing, cupping, checking, splitting, twisting, honeycombing, case hardening, collapse, warping, and radial shakes are also outlined. The document concludes by discussing some wood derivatives used in construction including plywood, chip
This document discusses defects and diseases that can occur in wood. It describes natural defects like knots, resin pockets, shakes and waney edges that form during tree growth. It also covers artificial defects such as cupping, bowing, twisting and end splitting caused by improper drying. Fungal diseases and insect pests that damage wood are also examined, along with conditions needed for decay. The life cycles of fungi and boring insects are detailed.
This document summarizes several diseases that affect apples:
1. Apple scab, caused by the fungus Venturia inaequalis, causes black spots on leaves and fruits. Spores are spread by wind and rain. Management includes clean cultivation, resistant varieties, and fungicide sprays.
2. Powdery mildew, caused by Podosphaera leucotricha, produces white or gray powdery patches on leaves, twigs, and fruits. Spores are wind-borne. Management includes sanitation, pre-bloom lime sulfur sprays, and resistant varieties.
3. Fire blight, caused by bacterium Erwinia amylovora, affects blossoms, shoots, branches
The document discusses defects in timber due to insects and seasoning. It identifies three main insects that cause decay: beetles, marine borers, and termites. Beetles cause rapid decay through pin-sized holes and tunnels, converting wood to powder. Marine borers live in salt water and make shelter holes up to 25mm in diameter and 60mm long. Termites, also called white ants, make internal tunnels without disturbing the outer shell. Only teak and sal wood can resist termite attacks due to natural chemicals. Seasoning defects include bow, case-hardening, check, collapse, cupping, splitting, honeycombing, radial shakes, twisting, and warping.
This document discusses various types of timber, their properties, and common defects. It describes popular timbers used in India like teak, sal, rosewood, mango, and jack. Each timber's density, strength, sources, and common uses are provided. The document also outlines natural defects like knots, shakes and man-made defects from fungi, seasoning, conversion or insects that can impact timber. Common fungi that cause rot like dry rot and wet rot are defined. Defects from seasoning like bowing, twisting and checking are also summarized.
The fungus Taphrina deformans causes peach leaf curl, a plant disease characterised by leaf distortion and colouring. Peach, nectarine, and almond trees are the most commonly affected by peach leaf curl disease.
This document discusses common tree diseases and disorders caused by biotic and abiotic agents. It describes symptoms of diseases like powdery mildew, anthracnose, bacterial leaf scorch, and various tree cankers. Signs and conditions favorable for disease development are explained. The role of stress factors in predisposing trees to disease is also covered. The document provides guidance on diagnosing tree problems and submitting samples for analysis. Common urban tree insects like bark beetles, borers, caterpillars, and sucking insects are also outlined.
The document discusses various natural defects that can occur in timber, including burls, callus, chemical stains, coarse grain, dead wood, druxiness, foxiness, knots, rind galls, shakes, twisted fibers, upsets, water strain, and wind cracks. Knots are further classified based on size and type. Shakes are classified into cup, ring, heart, star, and radial shakes. The defects are caused by natural forces like injury, chemical reactions, rapid growth, fungi, poor ventilation, and exposure to wind and water. Timber with these defects may have reduced strength, durability, and suitability for uses like engineering.
This document provides information on early and late season apple diseases, their symptoms, development and control methods. It discusses diseases like apple scab, cedar apple rust, powdery mildew, sooty blotch, fly speck, black rot and white rot. It describes the symptoms of each disease on leaves and fruit. It also explains how each disease develops and is transmitted. Finally, it provides general integrated pest management strategies like site selection, canopy management, sanitation and use of resistant varieties to control apple diseases.
Macrophomina phaseolina is a soil-borne fungus that causes charcoal rot, a disease that affects over 500 plant species. It produces microsclerotia that allow it to survive in soil or plant debris for years. The fungus infects roots and stem vascular tissue, blocking water and nutrient transport and causing wilting, premature death, and reduced yields. Symptoms include stem and root discoloration and hollowed stems with small black microsclerotia visible underneath the epidermis. Management strategies include fungicides and cultural practices like crop rotation and solarization to control the fungus in soil.
Two species of voles, the California vole and montane vole, are responsible for the majority of damage in California. Voles are small, mouse-like rodents that live in extensive underground burrow systems. Their populations fluctuate cyclically, sometimes reaching outbreak levels of thousands per acre. Voles cause damage by feeding on plants, trees, and shrubs in gardens and landscapes. Effective management of voles involves habitat modification to remove protective ground cover, trapping, and the use of anticoagulant baits.
This document discusses several pests that affect cardamom plants and their management. It describes the symptoms caused by thrips, shoot and panicle borers, beetle borers, hairy caterpillars, shoot flies, whiteflies, aphids, and root grubs. It then provides management recommendations for each pest, which include regulating shade, removing infected plant parts, collecting and killing adult insects, and applying insecticide sprays or soil treatments. The goal is to control these pests and prevent damage to the cardamom flowers, pods, and roots.
This document discusses defects that can occur in timber, including natural defects present in the growing tree and artificial defects caused by processing or seasoning. It outlines the main types of defects such as growth defects like knots and shakes, grain defects including spiral and interlocked grain, and seasoning defects like checking, warping and collapse. Specific defects like brittle heart, heart rot and dry rot are also explained in terms of their causes and identification.
Apple diseases A Lecture To Tot ( FFS) By Allah Dad Khan Provincial Coordina...Mr.Allah Dad Khan
This document discusses symptoms and characteristics of 10 different apple diseases:
1. Black rot causes black spots on fruit that are not sunken and have black and brown zones.
2. Bitter rot causes brown, sunken spots and pink spore masses on fruit.
3. Apple scab causes olive-green spots on leaves and russeting on fruit.
4. Frog-eye leaf spot causes irregular, lobed leaf spots and can infect fruit.
5. Sooty blotch and flyspeck cause an unattractive appearance on fruit.
6. Powdery mildew causes a powdery white growth on leaves, twigs, and fruit.
7. Cedar apple rust
Loquat diseases By Allah Dad Khan Provincial Coordinator IPM KPK MINFALMr.Allah Dad Khan
This document summarizes four diseases that affect loquat trees: canker, Phytophthora root rot, fire blight, and Verticillium wilt. Canker causes circular brown spots and sunken areas on the bark, which is controlled by removing infected bark and spraying Bordeaux mixture. Phytophthora root rot is a soil-borne disease that causes wilting, yellowing foliage, and death over several years, controlled through water management and pruning. Fire blight causes dripping and staining on branches from cankers. Verticillium wilt infects through roots and causes foliage yellowing, stunting, and dieback, with no cure other than removing infected trees.
A training presentation for poisons officers at the NZ Poisons Centre. Discussed the main concerns regarding ingestions of common unidentified mushrooms in New Zealand.
This document discusses two major insect pests that affect cashew plants: the stem and root borer (Plocaederus ferrugineus) and the tea mosquito bug (Helopeltis antonii). The stem and root borer bores into and feeds on the stems and roots of cashew trees, potentially leading to branch and whole tree death. The tea mosquito bug feeds on young leaves, shoots, fruits and flowers, leaving black lesions and potentially causing fruits to drop prematurely. Management strategies for both pests include pruning wounds, applying pesticides, controlling weeds that may harbor the pests, and using biological controls like Weaver Ants for tea mosquito bugs.
The document discusses mango dieback caused by the fungus Lasiodiplodia theobromae. It affects mango crops in India, Nepal, China, and other countries. The fungus overwinters in pycnidia on diseased wood and releases spores during rainy weather which infect wounds on trees, causing cankers and dieback. Management includes pruning outside of rainy seasons, minimizing wounds, and applying fungicide to pruned areas to control the spread of the disease.
Turf grass diseases, symptoms and controlAnusha Babooa
This document discusses common turf grass diseases, their symptoms, and methods of control. It describes several fungal and bacterial diseases that affect cool-season and warm-season turf grasses, including anthracnose, brown patch, dollar spot, fairy rings, powdery mildew, Pythium blight, red thread, rust, and white patch. For each disease, it provides details on the causal pathogen, affected host plants, symptoms, and recommended control strategies involving fungicides, cultural practices, and environmental management.
This document provides information on types of defects that can occur in timber used as a construction material. It discusses defects that can arise from natural forces like wind, fungi, insects, and during the seasoning and conversion processes. Specific defects described include wind cracks, shakes, twisted fibers, upsets, rind galls, burls, water stain, chemical stain, dead wood, knots, coarse grain, foxiness, and druxiness. Defects that can occur during seasoning such as bowing, cupping, checking, splitting, twisting, honeycombing, case hardening, collapse, warping, and radial shakes are also outlined. The document concludes by discussing some wood derivatives used in construction including plywood, chip
This document discusses defects and diseases that can occur in wood. It describes natural defects like knots, resin pockets, shakes and waney edges that form during tree growth. It also covers artificial defects such as cupping, bowing, twisting and end splitting caused by improper drying. Fungal diseases and insect pests that damage wood are also examined, along with conditions needed for decay. The life cycles of fungi and boring insects are detailed.
This document summarizes several diseases that affect apples:
1. Apple scab, caused by the fungus Venturia inaequalis, causes black spots on leaves and fruits. Spores are spread by wind and rain. Management includes clean cultivation, resistant varieties, and fungicide sprays.
2. Powdery mildew, caused by Podosphaera leucotricha, produces white or gray powdery patches on leaves, twigs, and fruits. Spores are wind-borne. Management includes sanitation, pre-bloom lime sulfur sprays, and resistant varieties.
3. Fire blight, caused by bacterium Erwinia amylovora, affects blossoms, shoots, branches
The document discusses defects in timber due to insects and seasoning. It identifies three main insects that cause decay: beetles, marine borers, and termites. Beetles cause rapid decay through pin-sized holes and tunnels, converting wood to powder. Marine borers live in salt water and make shelter holes up to 25mm in diameter and 60mm long. Termites, also called white ants, make internal tunnels without disturbing the outer shell. Only teak and sal wood can resist termite attacks due to natural chemicals. Seasoning defects include bow, case-hardening, check, collapse, cupping, splitting, honeycombing, radial shakes, twisting, and warping.
This document discusses various types of timber, their properties, and common defects. It describes popular timbers used in India like teak, sal, rosewood, mango, and jack. Each timber's density, strength, sources, and common uses are provided. The document also outlines natural defects like knots, shakes and man-made defects from fungi, seasoning, conversion or insects that can impact timber. Common fungi that cause rot like dry rot and wet rot are defined. Defects from seasoning like bowing, twisting and checking are also summarized.
The fungus Taphrina deformans causes peach leaf curl, a plant disease characterised by leaf distortion and colouring. Peach, nectarine, and almond trees are the most commonly affected by peach leaf curl disease.
This document discusses common tree diseases and disorders caused by biotic and abiotic agents. It describes symptoms of diseases like powdery mildew, anthracnose, bacterial leaf scorch, and various tree cankers. Signs and conditions favorable for disease development are explained. The role of stress factors in predisposing trees to disease is also covered. The document provides guidance on diagnosing tree problems and submitting samples for analysis. Common urban tree insects like bark beetles, borers, caterpillars, and sucking insects are also outlined.
The document discusses various natural defects that can occur in timber, including burls, callus, chemical stains, coarse grain, dead wood, druxiness, foxiness, knots, rind galls, shakes, twisted fibers, upsets, water strain, and wind cracks. Knots are further classified based on size and type. Shakes are classified into cup, ring, heart, star, and radial shakes. The defects are caused by natural forces like injury, chemical reactions, rapid growth, fungi, poor ventilation, and exposure to wind and water. Timber with these defects may have reduced strength, durability, and suitability for uses like engineering.
This document provides information on early and late season apple diseases, their symptoms, development and control methods. It discusses diseases like apple scab, cedar apple rust, powdery mildew, sooty blotch, fly speck, black rot and white rot. It describes the symptoms of each disease on leaves and fruit. It also explains how each disease develops and is transmitted. Finally, it provides general integrated pest management strategies like site selection, canopy management, sanitation and use of resistant varieties to control apple diseases.
Macrophomina phaseolina is a soil-borne fungus that causes charcoal rot, a disease that affects over 500 plant species. It produces microsclerotia that allow it to survive in soil or plant debris for years. The fungus infects roots and stem vascular tissue, blocking water and nutrient transport and causing wilting, premature death, and reduced yields. Symptoms include stem and root discoloration and hollowed stems with small black microsclerotia visible underneath the epidermis. Management strategies include fungicides and cultural practices like crop rotation and solarization to control the fungus in soil.
Two species of voles, the California vole and montane vole, are responsible for the majority of damage in California. Voles are small, mouse-like rodents that live in extensive underground burrow systems. Their populations fluctuate cyclically, sometimes reaching outbreak levels of thousands per acre. Voles cause damage by feeding on plants, trees, and shrubs in gardens and landscapes. Effective management of voles involves habitat modification to remove protective ground cover, trapping, and the use of anticoagulant baits.
This document discusses several pests that affect cardamom plants and their management. It describes the symptoms caused by thrips, shoot and panicle borers, beetle borers, hairy caterpillars, shoot flies, whiteflies, aphids, and root grubs. It then provides management recommendations for each pest, which include regulating shade, removing infected plant parts, collecting and killing adult insects, and applying insecticide sprays or soil treatments. The goal is to control these pests and prevent damage to the cardamom flowers, pods, and roots.
This document discusses defects that can occur in timber, including natural defects present in the growing tree and artificial defects caused by processing or seasoning. It outlines the main types of defects such as growth defects like knots and shakes, grain defects including spiral and interlocked grain, and seasoning defects like checking, warping and collapse. Specific defects like brittle heart, heart rot and dry rot are also explained in terms of their causes and identification.
Apple diseases A Lecture To Tot ( FFS) By Allah Dad Khan Provincial Coordina...Mr.Allah Dad Khan
This document discusses symptoms and characteristics of 10 different apple diseases:
1. Black rot causes black spots on fruit that are not sunken and have black and brown zones.
2. Bitter rot causes brown, sunken spots and pink spore masses on fruit.
3. Apple scab causes olive-green spots on leaves and russeting on fruit.
4. Frog-eye leaf spot causes irregular, lobed leaf spots and can infect fruit.
5. Sooty blotch and flyspeck cause an unattractive appearance on fruit.
6. Powdery mildew causes a powdery white growth on leaves, twigs, and fruit.
7. Cedar apple rust
Loquat diseases By Allah Dad Khan Provincial Coordinator IPM KPK MINFALMr.Allah Dad Khan
This document summarizes four diseases that affect loquat trees: canker, Phytophthora root rot, fire blight, and Verticillium wilt. Canker causes circular brown spots and sunken areas on the bark, which is controlled by removing infected bark and spraying Bordeaux mixture. Phytophthora root rot is a soil-borne disease that causes wilting, yellowing foliage, and death over several years, controlled through water management and pruning. Fire blight causes dripping and staining on branches from cankers. Verticillium wilt infects through roots and causes foliage yellowing, stunting, and dieback, with no cure other than removing infected trees.
A training presentation for poisons officers at the NZ Poisons Centre. Discussed the main concerns regarding ingestions of common unidentified mushrooms in New Zealand.
This document discusses two major insect pests that affect cashew plants: the stem and root borer (Plocaederus ferrugineus) and the tea mosquito bug (Helopeltis antonii). The stem and root borer bores into and feeds on the stems and roots of cashew trees, potentially leading to branch and whole tree death. The tea mosquito bug feeds on young leaves, shoots, fruits and flowers, leaving black lesions and potentially causing fruits to drop prematurely. Management strategies for both pests include pruning wounds, applying pesticides, controlling weeds that may harbor the pests, and using biological controls like Weaver Ants for tea mosquito bugs.
Wood-boring beetles are a major cause of wood damage in homes after termites. There are several types of wood-boring beetles that infest homes, including true powderpost beetles (lyctid beetles), anobiid powderpost beetles, and bostrichid powderpost beetles. These beetles vary in size from 1/10 to 1/4 inches and damage both hardwoods and softwoods. Their lifecycles take 9-12 months and they emerge as adults, leaving distinctive powdery exit holes. Proper moisture control and targeted chemical treatments can help control active wood-boring beetle infestations.
This document summarizes information about forest insect pests and diseases that affect pine and hardwood trees in the southeastern United States. It discusses several bark beetle species that attack pine trees, including the southern pine beetle, turpentine beetle, and Ips beetles. Symptoms and management strategies are provided for dealing with bark beetle infestations. The document also covers the emerald ash borer, an invasive pest affecting ash trees, and the red oak borer, a native insect impacting oak trees. Finally, it briefly mentions some defoliators, leaf insects, and the hypoxlon canker disease affecting hardwoods in the region.
Oak is a tree with approximately 600 species that produces acorns. Ganoderma root rot is a fungal disease of oak caused by the fungus Ganoderma applanatum. It causes slow growth, dying branches, and yellow or small leaves. Eventually, the tree will fall over due to root decay. Bacterial leaf scorch is a bacterial disease caused by Xylella fastidiosa that browns the edges of oak leaves and can kill entire branches or trees. Sudden oak death is a disease caused by the oomycete Phytophthora ramorum that kills entire oak trees and was first found in California.
Wood-boring beetles are a major cause of damage to homes after termites. There are several types of wood-boring beetles that infest homes, including true powderpost beetles (lyctid beetles), anobiid powderpost beetles, and bostrichid powderpost beetles. True powderpost beetles are small, around 1/10 to 1/5 inches, and damage hardwoods. Anobiid and bostrichid beetles range from 1/8 to 1/4 inches and can damage both hardwoods and softwoods. Old house borers are the largest at 5/8 to 1 inch and primarily damage softwoods like pine. Control
This document provides information on insect pests that affect apple trees, including their taxonomy, climate and soil requirements, and life cycles. It discusses several major pests in depth: the European red mite, its life cycle and means of control using dormant oils and miticides; the woolly aphid, its gall-forming lifecycle and use of insecticides and natural predators for control; and the codling moth, its damaging larval stage within apples and use of bagging, biological controls, and insecticides for management. Other pests summarized include the apple stem borer, its boring damage and control through pruning; and the plum curculio, its crescent-shaped egg-laying wounds and monitoring
Shisham (Dalbergia sissoo) decline is one of the most important diseases of Shisham now a days. There are some causes and drawbacks have been mentioned in the slides.
This document discusses several diseases that affect maize crops:
- Banded leaf and sheath blight, caused by Rhizoctonia solani f. sp. sasakii, causes white lesions and purple bands on leaves and sheaths. It is soil-borne and most common in northern India.
- Pythium stalk rot, caused by Pythium graminicola, causes decay of the stalk internode above soil, twisting stalks that remain green. It overwinters in soil or plant debris as oospores.
- Fusarium stalk rot, caused by Fusarium moniliforme, causes premature death, lodging, and pink discoloration of shredded pith
Heart rot is a fungal disease that causes decay of the heartwood in tree trunks and branches. Fungi enter through wounds in the bark and slowly decay the inner wood, weakening the structural integrity of the tree. This can cause branches and trunks to break. Heart rot has major economic and environmental impacts. It causes significant losses to the logging industry by damaging timber. In forests, trees weakened by heart rot are more susceptible to disturbances and allow new growth, changing the forest environment over time. Heart rot is diagnosed through visual examination of symptoms and signs like mushrooms or decayed wood.
This document discusses several major pests that affect coffee crops and their management. It describes 11 pests in detail:
1. White stem borer, its identification, damage symptoms, and management including pruning, scrubbing, and chemical control.
2. Coffee berry borer, its identification, damage symptoms of holes and fruit drop, and management including quarantine, gleaning, and traps.
3. Shot hole borer, its identification, symptoms of wilting branches, and management of pruning and removal of infested materials.
4. Additional pests described include mealybugs, scales, leaf miners, cockchafers, snails, and termites. Control methods include maintaining shade, removing
This document discusses several common plant diseases caused by fungi and bacteria. It describes the symptoms, spread, and prevention methods for each disease. Fungal diseases mentioned include anthracnose, various leaf spots and blights affecting tomatoes and potatoes, early blight and late blight of potatoes. It also covers the rust disease cedar-apple rust. General prevention strategies recommended are removing dead plant debris, rotating crops, using fungicides appropriately, and choosing resistant plant varieties.
Wood-boring beetles are a major cause of damage to wood structures in homes. There are several types of wood-boring beetles that infest homes, including lyctid powderpost beetles, anobiid powderpost beetles, and bostrichid powderpost beetles. These beetles vary in size, shape, the types of wood they infest, and whether the larvae reinfest the same wood. Control methods depend on the severity and location of the infestation, and may include reducing wood moisture, surface treatments, mechanical removal, heating, or insecticide applications.
Wood-boring beetles are a major cause of damage to wood structures in homes. There are several types of wood-boring beetles that infest homes, including lyctid powderpost beetles, anobiid powderpost beetles, and bostrichid powderpost beetles. These beetles go through life cycles where the larvae bore into and feed on wood, while the adult beetles emerge through small exit holes, often leaving a powdery wood dust. The type of wood, its moisture level, and environmental conditions affect the severity of damage caused by each beetle species. Control methods include managing wood moisture, using surface treatments on wood, and insecticide applications if an active infestation is detected
This document provides an overview of common plant pests and diseases, their causes, and symptoms. It discusses that fungi, fungus-like organisms, bacteria, viruses, viroids, and phytoplasmas can all cause plant diseases. Examples are given of different types of diseases that affect leaves like powdery mildews, downy mildews, rusts, and leaf spots. It also discusses diseases that cause cankers, diebacks, and issues with roots and stems, giving the examples of fireblight, apple canker, and Phytophthora root rot. A wide range of virus symptoms are described affecting leaves, flowers, and fruit. The aim is to allow for better recognition of pest and disease symptoms
This document summarizes 9 common diseases that affect apples: apple scab, powdery mildew, cedar rust, fire blight, crown gall, black rot, sooty blotch, flyspeck, and Phytophthora diseases. For each disease, it provides the causal organism, symptoms, mode of survival and spread, and management recommendations. The diseases are caused by fungi, bacteria and oomycetes. Symptoms vary by disease but include lesions on leaves, fruits and shoots. Management involves sanitation, resistant varieties, and fungicide or antibiotic applications depending on the causal organism.
Pyricularia is a genus of fungi that was renamed to Magnaporthe. Magnaporthe oryzae, previously known as Pyricularia oryzae, causes the rice blast disease which is one of the most destructive diseases of rice worldwide. The fungus has a life cycle where its spores land on rice leaves and germinate to form specialized infection structures called appressoria that penetrate the rice plant and cause disease symptoms like diamond-shaped lesions on leaves and stems.
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2. • Introduction to UK forests
and Tree Health
• Pests and Diseases
• Conducting the survey
• Practical Training
3.
4. Trees are good for
our wealth, health
and happiness both
now and in the
future.
Economy Wellbeing Biodiversity
Climate Change National Heritage
5. • Trees have a life cycle
• Usually trees are healthy
• An increasing number of new pests and diseases are
attacking trees in the UK
• Increasing world trade and climate change are two contributory
causes for the increase
6. The Government works to protect the country from
pests and diseases by:
o Plant health legislation
o Inspecting imports
o Inspecting woods and plant nurseries
o Campaigns to eradicate outbreaks
o Conducting research
o Raising people’s awareness
What we can all do to help:
o Public engagement assists with surveillance
o This is where OPAL fits in… We need your help!
7. Previous OPAL Surveys: The Tree Health Survey:
Soil and
Earthworm
Air Biodiversity
Water Climate Bugs Count
8.
9. What are plant pests and diseases?
Pests: usually invertebrates
(insects, mites, nematodes)
Diseases: caused by pathogens
(fungi, bacteria, viruses)
Survey will focus on 18 pests and diseases
10. 2003 2005
2011
Horse Chestnut Leaf MinerChalara ash dieback
Monitoring pests and diseases affecting Britain’s trees aids our
understanding of their impact, their changing distribution and helps to
manage their spread.
For Example:
11. Knopper Gall wasps (Andricus
quercuscalicis) arrived in southern
England in the 1950s and have now
invaded most of the UK.
• Ridged and knobbly
protrusions on acorns
(from July onwards)
caused by a tiny gall
wasp
• Does not kill tree but affected
acorns cannot germinate
12. The roller moth, Tortrix viridana, is a native species of micromoth.
• Loss of leaves in May and June
• Edges of leaves curled up into a tube
• Heavily infested trees can be completely defoliated
• There are other native defoliators on oak
13. • Attacks young leaves and
soft shoots, covering them
with felty-white mycelium
and dry powdery spores
• Leaves may shrivel and blacken
• Mild overcast conditions are optimal for
development of the disease, usually
appears in summer
Erysiphe alphitoides is a common foliar
fungal pathogen of oak throughout
Europe. First found in England in 1908, it
contributed to an oak dieback episode
the 1920s.
14. Oak decline is a complex disorder:
Several damaging abiotic (e.g. drought) or biotic (e.g.
insects and fungi) agents interact. It can be simultaneous
&/or sequential and outcome can be a serious decline in
tree health, may be terminal, but trees can also recover.
Not a new disorder but recently we have come to
recognise:
• Chronic Oak Decline (COD): slow effect about 10-50
years, focus on roots
• Acute Oak Decline (AOD): fast effect approximately 3-
5 years, focus on above ground parts
15. Serious episodes of oak decline have
been documented for almost 50 years
in the UK.
• Early signs are
yellowing or fewer
leaves
• Later, dead branches can be seen
• Severe cases, dark weeping
patches on trunk which dry to
black crust
• D shaped holes in trunk bark
• Canopy dieback and /or thinning
• Bacterial lesions Agrilus beetles
16. Photograph courtesy of Nigel Straw, Forest Research
• Sparse foliage
• Wilted and blackened leaf
shoots (May onwards)
• You mat find entrance / exit
holes in buds and at base
of wilted shoots
• Silken webs and frass (fragments of
bark) may also be visible
• Symptoms most obvious on younger
trees
The ash bud moth Prays fraxinella, is a
native species of micromoth.
17. • Look for a woody
encrustation on the stalk
of the ash keys
• Galls are green at first becoming
brown later
• Older galls can remain attached for
over a year, so visible for year round
• The galls make ash keys heavier so
wind dispersal is hindered
Also known as cauliflower gall, it is
caused by the eriophyid mite Aceria
fraxinivora.
18. Photograph courtesy of Nigel Straw, Forest Research
• New cankers look like a
depression on the trunk or
branches
• Causes death of twigs
• Centred on small branch stubs or their
remains
• Older cankers look like a target: concentric
rings of dead wood
Nectria canker is caused by the fungus
Neonectria galligena. It is a native disease
which may be linked to existing wounds,
causing dieback of twigs and sometimes
branches to break.
19. Ash decline is caused by a
combination of factors that affect the
roots and causes a gradual decline in
the tree.
• Death of a number of twigs
and branches
• Poor growth in the crown
• Common in hedgerow trees
beside ploughed fields,
especially on drier sites
• Dieback is progressive over a number of years.
• Recovery is possible and trees take on appearance of a healthy crown with
some dead branches
20. • Red-brown blotches on
leaves, outlined in yellow
• Hold the leaf up to the light – blotches
are not translucent
• Blotch spreads across leaf veins
• Disfigures but does not kill tree
• May appear in combination with Horse
Chestnut leaf miner
Photos courtesy of Nigel Straw, Forest Research
Caused by the fungus Guignardia aesculi,
this disease was first reported in Britain in
1935.
21. Horse chestnut leaf miner
• Brown blotches on upper or lower
surface of leaves
• Hold the leaf up to the light – blotches
are translucent
The micro moth, Cameraria ohridella arrived in the
UK in 2002 from Europe. Ten years after the pest
was first seen in Wimbledon those trees remain in
good health.
• Mines constrained by leaf veins
• May appear in combination with Horse
Chestnut leaf blotch
• Severely damaged leaves shrivel and
turn brown in late summer
22.
23. • Rusty coloured liquid oozes from
trunk bark
• Liquid dries to black crust at point
of exit
• Severely affected trees have thinning crowns with
dead branches
• Severe attacks can kill trees
• Bark killing may be so extreme that damaged bark
peels of tree exposing wood beneath
Photos courtesy of Nigel Straw, Forest Research
Caused by the bacterium Pseudomonas syringae
pathovar aesculi, this disease suddenly appeared in
the early 2000s.
24. • Circular white spots
topped with brown
or orange on trunk
or branches
• Found on many tree species
including Horse Chestnut,
Sycamore and Lime
• Visible in May and June
• Disfigures but does not kill tree
Caused by the insect Pulvinaria regalis,
first found in Britain in 1964
25.
26. Chalara fraxinea emerged as an
entirely new disease in Europe in the
1990s and first found in Britain in
2012.
• Stem lesions typically
centred on side branch
infection
• Death of twigs and
branches
• Girdling of shoots and stems
resulting in dieback, young trees
particularly vulnerable
• Common ash (Fraxinus excelsior)
very susceptible
H. pseudoalbidus
fruit bodies on
fallen ash
27. • Initial thinning and yellowing
of foliage
• Tunnels made by larvae in
the bark have sharp bends
and meanders
• Bark has narrow fissures (cracks) about
5-10 cm long, caused by scar tissue
produced by tree after larval feeding
• D shaped holes (c.3mm diameter)
produced in trunk by emerging adults
Photos courtesy of Nigel Straw, Forest Research
Agrilus planipennis is NOT present in
UK, its arrival would be a cause for great
concern.
28. Photos courtesy of Nigel Straw, Forest Research
Thaumetopoea processionea is present
in London and areas of Berkshire.
• Caterpillars cause defoliation
• Caterpillars show distinctive
habit of moving about in late
spring and early summer in
nose-to-tail processions
• Build distinctive white, silken webbing
nests in oak trees and leave white trails up
stem
Causes human health problems
AVOID any contact!
29. • Caterpillars cause
defoliation of needles
• Most distinctive life stage is the
caterpillar, which is coloured orange-
brown with blue bands covered in
dense clumps of hairs. Wedge shaped
procession moving nose-to-tail
• Caterpillars most likely to be seen
winter and early spring. Overwinter in
tent-like like nests high in Pine trees
Thaumetopoea pitycampa NOT
present in UK.
Causes human health problems
AVOID any contact!
30. March 2013
• Infest a wide variety of tree
species, especially Poplar,
Sycamore and Willow.
• Adults are black shiny, 20-
35 mm long and 7-12 mm
wide with about 20
irregular white spots
• Distinctive long antennae. Antennae
segments are black with distinctive blue-
grey/creamy-white base.
• Circular breeding exit holes are up to 10
mm in diameter, usually higher on the trunk
than the Citrus Longhorn Beetle
Recent outbreak of Anoplophora glabripennis in Kent was eradicated, so
NOT present in UK. Would be a major threat if they became established.
31. • Very similar in appearance to the
Asian Longhorn beetle
• Could infest a wide variety of tree
species, especially maples
• Adult beetles are large and black with variable
white markings
• They have very long antennae which are black
with white/light blue bands
• Circular breeding exit holes 5-10 mm in diameter
have been found on maple saplings, usually near
the base of the trunk
Anoplophora chinensis is NOT present in UK. Would be a major threat to
horticulture and the wider environment if they became established.
32.
33. • Check the
website
• Read the
instructions
• Landowners
permission
• Health and safety
http://www.opalexplorenature.org
34.
35. All the equipment that you need is in the
pack, which contains:
Field Notebook Field Guide
Fold Out Tree Guide
Most Unwanted
Guide
Tape Measure
Optional Equipment:
Camera
OS Maps or GPS
Smart Phone
Pencil
36.
37. Activity 1 can be carried out on any tree, but preferably on Oak, Ash or
Horse Chestnut.
38. This activity can be done on Oak, Ash or Horse
Chestnut only.
• Ideally survey the same tree as used in Activity 1
• Use the field guide to identify whether your tree
has any of the four pests/diseases of your chosen
tree species
Please take a photo if you think you
identify any of the pests/diseases on your
tree
39. This part of the survey can be done on
any tree, and at any time
• Results can be submitted independently of
the rest of the survey
• Use Most Unwanted guide to help with
identification
• Health and safety
• Bio-security guidance
Take a photo of the Most Unwanted
and submit via the OPAL website or the Tree
Alert App/ webpage…
http://www.forestry.gov.uk
40. • Submit via the OPAL website or
freepost address
• Activity 1, 2 and 3 results can be
submitted independently
• Photos
• Record your location accurately
It’s really important that you send us your results once you have done
the survey.
41. Good crown density, leaf colour and no signs of
other damage = tree is in good overall condition
High levels of defoliation and/or discoloured
leaves
= tree will grow at a slow rate
Oak decline and ash decline = tree is suffering
a range of problems
Weather events, climate change and human
activity = influence the geographic distribution
of common tree pests and diseases
Reports of our ‘Most Unwanted’ pests = track
the arrival and spread of quarantine species
Additional Notes:Welcome to the Tree Health Survey Training session.House keeping notices for venue.General information on this presentation:Each slide is accompanied with notes to augment the information presented. These are split up into Slide Comments (information to be given to the audience), Image Details (If you or the audience would like to know what they are showing) and Additional Notes (Background information for the presenter).Photographs are sourced from Forest Research, Forestry Commission or Fera. Known photographers are documented in the notes section.! Please note that the OPAL magnifying glass indicates the identifying features of the pest / disease and the blue box indicates the presence in the UK. Red boxes will indicate where there is risk to human health.
Slide Comments:The training structure.Introduction to UK forests and Tree HealthThe Value of Trees Tree HealthThe OPAL SurveyPests and DiseasesIntroduction Why Study These Pests and Diseases?Specific Pests and DiseasesConducting the surveyBefore You Start How to do the ActivitiesSubmitting Data and ResultsPractical TrainingExplore outsideTimings and breaks…
Slide Comments:The first section: and introduction to trees and tree health…
Slide Comments:The second section: an introduction to pests and diseases…! Please note that the OPAL magnifying glass indicates the identifying features of the pest / disease and the blue box indicates the presence in the UK. Red boxes will indicate where there is risk to human health.It may be useful to provide a short introduction to the Twelve Common Pests and Diseases that affect Oak, Ash and Horse Chestnut…i.e. looking in more detail at four pests and diseases that commonly affect each tree species. The first of which is the knopper gall…
Slide Comments:Monitoring pests and diseases affecting Britain’s trees aids our understanding of their impact, their changing distribution and helps to manage their spread. Answers questions about whether levels of damage caused by specific pests and diseases are becoming more or less severeIdentifies the extent to which specific trees or tree species are being affected by multiple pests and diseasesNeatly show different ways to display data. Can collect data on the presence absence of diseases and the severity. These images demonstrate the spread of the diseases, and in the case of Chalara, the origin. This is why we need to monitor pests and diseases i.e. the purpose of this Survey.NB: Chalara map not up to date, should show 2012 for UK. Image Details:Chalara: The spread of Chalara across EuropeLeaf Miner: The spread of the miner across the UK. The latest HC leaf miner map is the 2010 one though Nigel Straw is currently working on the new maps.Additional Information:From Survey PackCollecting information on the pests and diseases affecting Britain’s trees helps scientists find out more about changes in their effects or distribution. This information will help answer questions about whether levels of damage caused by specific pests and diseases are becoming more or less severe. It will also help researchers identify the extent to which specific trees or tree species are being affected by multiple pests and diseases. Sometimes pests and diseases that would only cause minor damage in a healthy tree can act together, making it weak and vulnerable and even tipping it into decline.Background information on pests and diseases affecting Oak, Ash and Horse Chestnut..OaksOur native oaks, known as English Oak (Quercusrobur) and Sessile Oak (Quercuspetraea), arethe most common broadleaved tree. Some of the oldest are over 100 years old. Native oakpopulations suffer from a number of pests and diseases. Usually the effects are temporary andthe trees soon return to full health. However, if an individual tree is seriously damaged for severalyears in a row, it can initiate a disorder known as ‘oak decline’. In this weakened state, oaks maythen be attacked by other organisms that would not usually bother a healthy tree, but may contribute to oak decline and eventually cause its death.AshIn Britain, Ash (Fraxinus excelsior) is the third most common broadleaved species (after Oak andBirch) and is a native species that is widespread throughout woodlands and hedgerows. Theclusters of ash fruits are known as ‘keys’ and often remain hanging on the trees after leaf fall inautumn.Ash can suffer from a variety of root and trunk rots that can cause late flushing (opening ofleaves in spring), thinning foliage and decline.However, very recently, a new and often fatal disease Ash Dieback, has been found in Britain.This disease has become widespread in mainland Europe over the past two decades.Horse Chestnut Horse Chestnut (Aesculushippocastanum) is native to south-east Europe, but was introduced into Britain over 300 years ago.Its striking creamy white flowers appear in early June and provide pollen for many insects. The characteristic fruits (conkers) are produced in September.Over recent years a number of pests and diseases have affected horse chestnut. Most of these are relatively recent arrivals in Britain but have spread steadily through horse chestnut populations and can be very damaging.
Slide Comments:! Please note that the OPAL magnifying glass indicates the identifying features of the pest / disease and the blue box indicates the presence in the UK. Red boxes will indicate where there is risk to human health.Pest summary:Knopper Gall can be very common in some years and so reduces the level of regeneration. The galls on acorns are from the second generation of the wasp. The first generation causes currant galls of the flowers of Turkey oak.Image Details:Knopper gall: Photograph courtesy of Nigel Straw, Forest ResearchAdditional Information:From Forest Research Expert: This is a very common pest symptom. It looks as if the acorns were made out of plastic and have melted. They are greasy in appearance.This symptom is the second stage of infection: at first these wasps reside on Turkey Oak (creating current galls) and then move to English Oak to create the knopper gall. From SurveyKnopper galls are caused by a tiny gall wasp called Andricusquercuscalicis. If you cut open the gall, you should see the white wasp grub (larva). The wasps arrived in southern England in the1950s and have now invaded most of the UK. The wasp does not kill the tree, but affected acorns cannot germinate.It produces ridged outgrowths on the acorns of native (pedunculate) oaks; forming in August they are sticky and red, later becoming woody and brown. Does not kill tree but affected acorns cannot germinate
Slide Comments:Pest Summary:Tortrix roller moth: A serious defoliator of oak but severe outbreaks are cyclical, usually 4 to 5 years apart. Defoliated trees will re- foliate in the same year but repeated severe defoliation can weaken the tree and contribute to oak decline.Other common oak defoliators include OperophterabrumataandErannisdefoliaria. Generally damage is not as severeImage Details:Left: Adult which is occasionally seen.(Photos courtesy of Nigel Straw, Forest Research)Middle: Large olive brown caterpillar.(Photos courtesy of Nigel Straw, Forest Research)Right: Leaf rolls created by tortrix(From ‘Insect Images’ under the Creative Commons licencePhotographer Information: Name: PetrKapitola:Organization: State PhytosanitaryAdministration:Country: Czechia)Additional Information:From Forest Research Expert:- The key ID feature is the rolled leaves.- Creates such devastation that you can walk into a wood in July and it looks like winter. Oaks can re-foliate up to three times in a season, but the tree expends a lot of energy doing so.A trick for testing if it’s a roller moth is to pole the caterpillar and it will always move backwards.From Survey PackThe roller moth, Tortrixviridana, is a native species of micromoth. The moth caterpillars feed on tender new leaves. Heavily infested trees can be completely defoliated. (lose their leaves), affecting the tree’s ability to photosynthesise. When the caterpillars pupate (become an adult moth), they roll the leaf edges around themselves, hence the name ‘roller’ moth. Oak is generally very resilient to defoliation. Single defoliations generally have limited effect on growth and no long-term effect on tree health. Severe defoliation repeated over several years appears, especially in association with drought, to be a pre- disposing factor that can lead to oak decline.From Forestry Commission Website:Most notable among the early season defoliators are oak leaf roller moth Tortrixviridana (below left) and winter moth Operophterabrumata (below right). Both species have egg hatch time to coincide with bud burst in the spring and the young larvae feed on the newly expanding leaves. When numbers are high, complete defoliation of trees can occur, but a second flush of leaves later in the season partially offsets the negative effect on trees. However, it is likely that severe defoliation does reduce the ability of trees to defend themselves from attack by other agents.More information at: http://www.forestry.gov.uk/fr/infd-7b3d8v
Slide Comments:Disease Summary:Oak mildew: Widespread disease that varies in severity according to weather conditions in a particular year. Not in itself very damaging but is part of the oak decline syndrome.Image Details:Top: Silvery appearance on leavesBottom: Close up of mildewAdditional Information:From Forest Research Expert:- People often describe the leaves as silvery in appearance.- Can get blackening effect and leaves shrivel- There are two infection periods, most people usually see summer one. It most typically affects the second flush of leaves on oak (known as lammas growth, produced in July and August). If the first set of leaves have been affected by tortrix, then a mildew attack on the second leaf flush can be very debilitating , especially if it happens several years in succession. - Buds with mildew are often more sensitive to low temperatures. The White growth of powdery mildews makes them one of the most easily recognised fungal diseases. Whilst powdery mildews will rarely kill a plants, it will cause a loss of vigour and may lead to decline.There are many different species of powdery mildew, but they have a fairly limited host range, often affecting plants from just one family. The powdery mildew that infects Oaks will only infect Oaks, although you may see other powdery mildews on other plants in the same area they will be different species.The majority of the growth of most powdery mildews is present on the surface of the plant.Powdery mildew symptoms consist of white or of white fungal growth on surfaces mainly young leaves and stems. The growth consists of mycelium (felty) and asexual spores (powdery appearance). It is usually most powdery when the humidity is high large numbers of spores are produced. The fungus may also produce sexual spores within a brown or black, pin headed sized fungal fruiting body which is found amongst the mildew growth later in the season. It plays an important role in overwintering. Powdery mildews are obligate parasites meaning that they require living host tissue on which to grow. The asexual spores of powdery mildews are often produced in huge numbers (many thousands on a single leaf) and are readily dispersed by air currents, water splash, etc. The symptoms of powdery mildew of oak is very obvious and characteristic and is easily identifiable in the field. It may be possible to confuse it with other point leaf deposits such as lime scale, pesticides or even bird droppings! However, the powdery nature of the spores is very characteristic-you can demonstrate superficial nature of the fungus by placing a piece of sticky tape on the upper surface of the leaf and pulling it off carefully leaving behind an otherwise green leaf.The powdery mildew usually colonises younger leaves on shaded stems-it is interesting to note that older leaves or stems in full sunshine may not be infected even though other parts of the tree are covered in powdery mildew.
Slide Comments:Pest Summary:Ash bud moth: Destroys or damages buds, especially the terminal buds, causing poor flushing or wilting of partially flushed leaves. Attacks are cyclical and severe damage can exacerbate ash decline.Image Details:Top: Canopy thinningBottom Left: Terminal apex wiltingBottom Right: Lateral apex wilting(Photos courtesy of Robert Strouts, Forest Research)Additional Information:From Forest Research ExpertAsh has always had pests and diseases,Chalarais not the first.Can be confused with the early stages of Chalara.This is a cyclical problemIf a fungus enters the wound can kill the whole shoot. From survey:The ash bud moth Prays fraxinella, is a native species of micromoth. The moth caterpillars feed on Ash leaves and make tunnels in ash buds or in the bark at the base of new shoots. If holes aremined in the base of the bud, the leaf shoots may either fail to flush (grow) or may flush but then wilt and blacken. You may also be see caterpillars’ entrance/exit holes, and silken webs. Symptoms aremost obvious on younger trees.
Slide Comments: Pest Summary:Ash key gall/Cauliflower gall: limited effect on the tree though it can restrict seed dispersal.Image Details:- Ash key gall attached to stemAdditional Information:From Forest Research Expert:Very common, are likely to see many galls and this indicates a healthy tree (as mites prefer health trees). From SurveyAsh key galls are caused by the mite Aceriafraxinivorus. The crusty galls are green at first, but later become brown. Older galls can remain attached for over a year, so they stay visible all year round.The galls make ash keys heavier, so wind dispersal is hindered and the seeds are not carried as far.From Forest ResearchSymptoms are caused by a mite that causes tremendous proliferation of flower buds on male ash trees.Eriophyid mites on very small and less than 0.5 mm long and may easily be overlooked, they may be seen with a magnifying glass but even then this can be quite difficult.
Slide Comments:Disease Summary:Nectria canker: Large cankers on branches or stems can lead to breakage. Even where this does not occur the timber value, in the case of stem cankers, is severely reduced.Image Details:- Top: Close up of canker- Middle: concentric rings of canker about 25 years old caused by this fungus on the main stem of an ash.- Canker along stemAdditional Information:From Forest Research Experts: A key identification point: the canker looks as if someone has pushed their thumb into plasterscene. Thenectria canker will only appear on one side of the trunk whereas a bacterial canker will spread around the circumference of the trunk at look rough in appearance.It will leave a scar.Susceptibility is geneticFrom surveyNectria canker is caused by the fungus Neonectriagalligena. It is a native disease which may be linked to existing wounds and cancause branches to break. The canker (patch of dead or infected wood) usually has a small side branch or wound at its centre.Cankers are smooth or ridged, rather than gnarled or knobbly. In the autumn you may see the fungal fruiting bodies – small(1-2 mm) orange-red spheres or dots at the edge of the canker.From Forest ResearchNeonectriagalligena (Nectriagalligena) causes perennial cankers and dieback of various broadleaved trees in temperate regions around the world. The fungus has a very broad host range affecting amenity, Forest and orchard trees (it is a very common problem on apple trees for example).SymptomsLesions first appear as small, dark, depressed areas on young smooth barked stems and they often kill twigs by girdling them. Most cankers are centred on small branch stubs or their remains, and disease trees he usually have more than one canker. Cankers on most hosts become perennial and target shaped. They expand slowly, usually during host dormancy, and often less than 1 cm in year. During the growing season callous and woundwood form around the region.Bright red or reddish orange lemon shaped fungal fruiting bodies left the 0.5 mm in diameter develop in autumn to spring on dead bark. They form singly or in groups on young cankers still covered with bark or on woundwood.The fungus overwinters as sexual fruiting bodies and mycelium in dead bark. Sexual spores are expelled from fruiting bodies and dispersed by wind or water any time of the year during rain or moist periods its primarily in spring and autumn.Middle Photo: Perennial ' target ' canker about 25 years old caused by this fungus on the main stem of an ash.
Slide Comments:Summary:Ash decline: A progressive decline over a number of years which dieback mainly starting in the upper crown. The dieback allows the entry of decay fungi causing loss of timber value and creating a safety hazard for trees in public places and along roadsides and paths.Image Details:Ash decline in canopyAdditional Information:From Forest Research Expert:Can result in the death of a major part of the crownBecause it is progressive, will need to be monitored over a number of years.From Survey:Ash decline is caused by a combination of factors that affect the roots and causes a gradual decline in the tree. It is common in hedgerow trees beside ploughed fields, especially on drier sites. Check the symptoms for Chalara dieback of Ash in the Most Unwanted Guide before diagnosing Ash decline.FromForestResearch:Ash decline is a long known disorder, which has been around much longer than Chalara ash dieback. Typically trees affected by ash decline are found where there is likely to have been root damage (e.g. edge of ploughed field) or on drier sites. Often a combination of physical and biological factors have casued the deline.
Slide Comments:Disease SummaryHorse chestnut leaf blotch: A disfiguring condition that is often linked to wet weather in mid-summer. Not considered to be a major problem but there may be interactions with other problems on horse chestnut.Image Details:- Top: Blotch on leafBottom: Fruiting bodies on underside of leafAdditional Information:From Forest Research Expert:- Yellow outline is diagnostic.- Appears in June- It is distinctive and easy to identifyFrom Survey:Caused by the fungus Guignardiaaesculi, this disease was first reported in Britain in 1935. Blotches are on the leaf tips and edges, and you may also see tiny black dots in the blotches. Sometimes the whole leaf turns brown and shrivels. Leaf blotch is considered disfiguring rather than damaging. Look carefully, as leaf blotch can be present when Horse Chestnut Leaf-miner is also present.From Forestry CommissionGuignardiaaesculi is a fungal foliar pathogen. Symptoms first appear as water soaked irregular areas that enlarge rapidly. Within a few days they turn reddish brown to black common often bordered by a yellow band that emerges gradually with green tissue (leaf miner lesions are more clearly defined and are see-through). Small lesions may be limited by veins, larger lesions often coalesce and cause distortion and partial shrivelling of leaflets. Severe disease causes premature defoliation.The fungus produces black fruiting bodies less than 0.2 millimetres with in the necrotic spots that can be seen erupting through the upper leaf surface, they will be visible using a magnifying glass or hand lens.The fungus over until fallen leaves and spores are released in early spring into the air during wet weather while leaf are developing. Symptoms develop within 2 to 3 weeks of infection. Infection may occur during the season leading to the rapid buildup of symptoms.
See Previous two slides for Slide Comments and Additional Information.Image Details:White= blotchesRed or brown blotches are on the leaf tips and edgesoften outlined in yellowHold the leaf up to the light, blotches are NOT see-throughBlue= Leaf-minerBrown blotches on the upper or lower surface of the leafHold leaf up to the light, blotches ARE see-through and can usually see larvae in mines.
Slide Comments:Disease Summary:Bleeding canker of horse chestnut: An introduced disease that causes damage, often severe and resulting in death of the tree, that has spread rapidly. Changes in levels of infection are important to understand its likely long-term impact.Image Details:- Top: Trunk with bleeding cankerBottom: Close up of canker oozing and rusty liquid.Additional NotesFrom Forest Research Expert:Has had a large impact in the nursery sector90% likely to be bacterium. Bleeding is caused by the living organism attacking the treeTypical case of an introduced pest, exponential increase when brought in but cases now in decline, 53% are resistant to the canker.From Survey:Caused by the bacterium Pseudomonas syringaepathovaraesculi, this disease suddenly appeared in the early 2000s. It attacks and kills the bark of infected trees. The bark is often cracked and disrupted. Severely affected trees have thinning crowns with dead branches, and ultimately the tree can die if the infection is very severe.From Forestry Commission website:Incidence of the diseaseGeographical location of cases of Horse Chestnut Bleeding Canker reported to Forest Research Disease Diagnosis Advisory ServiceUntil recently, such Phytophthorableeding cankers were considered to be uncommon and were only seen in the south of England (Strouts and Winter, 2000). However, over the past four or five years, the number of reports of horse chestnut trees (Aesculushippocastanum) with 'bleeding cankers' has increased markedly. Symptoms visible on the heavily affected trees include extensive bleeding areas on their stems and sometimes on their scaffold branches. The increased incidence of stem bleeding on horse chestnut is not just limited to the UK; the Netherlands, Belgium, France and Germany are also experiencing a similar upsurge.Closer investigation of the bleeding cankers on horse chestnut has revealed that Phytophthora is no longer the primary causal agent. Instead a completely different pathogen, Pseudomonas syringae pv aesculi, is responsible for the increase in these symptoms appearing on horse chestnut.Over the past four years the Tree Health Diagnostic and Advisory Service of Forest Research has received increasing numbers of reports about the disease. In 2000 only four reports had been received but by 2003 more than 60 reports of stem bleeding in horse chestnut were recorded. In 2004, 90 reports were received, around 75 in 2005, and more than 110 in 2006. Affected trees have been recorded as far north as Lancashire, Glasgow and Fife.What trees are affected?Trees of all ages have been affected by the recent disease upsurge. Young trees with a stem diameter of only 10cm (4 inches) have been found with advanced symptoms. However, the impact on the environment can be particularly profound when large, mature trees are infected and disfigured by the disease. If the disease is severe and the areas of bark which are killed are extensive, large trees can undoubtedly be killed. However, younger trees (10-30 years old) are at greater risk and can succumb to the disease in just a few years (3-5) as the smaller diameter of their trunks means that they can be girdled more quickly.pathogen known as Phytophthora (Brasier and Strouts,1976). The same disorder had also been recognised in the USA much earlier in the 1930’s (Caroselli, 1953).More information can be found at: http://www.forestry.gov.uk/website/forestresearch.nsf/ByUnique/INFD-6KYBGV
Slide Comments:Pest Summary:Horse chestnut scale: Another introduced pest that is found on other species of broadleaves as well as horse chestnut. Not damaging in itself but may be a problem in combination with other pests and diseasesAdditional Information:From Forest Research Expert:Can easily see the brown carapace of the dead females atop of the white egg case. When young emerge, head up trunk to feed on the leaves and female adults come back down the trunk to lay eggs. Identification feature: Tree looks leprous. From SurveyIn May or June, the adult female produces a white woolly ovisac (egg capsule) into which she lays hundreds of eggs. She dies after laying, but remains attached to the ovisac.The white ovisacs could be mistaken for bird droppings, and although they disfigure the tree, they do not kill it.From the Forestry Commission Website:Horse chestnut scale, apparent as circular white spots on trunks or large branches (and sometimes mistaken for pigeon droppings), is caused by the insect Pulvinariaregalis. This insect pest is occasionally found disfiguring trees in urban localities.
Slide Comments:Moving on to the Six Most Unwanted…
Slide Comments:All noted on slide.Image Details:Top Left: leaf wilting (Photo courtesy of Thomas Kirisits)Top Middle: Lesion (Photo courtesy of Thomas Kirisits)Top Right: Lesion (Photo courtesy of Thomas Kirisits)Bottom Left: Leaf browning (Image courtesy of I Thomsen and L McKinney) Bottom Right: Fruiting bodies (Image courtesy of I Thomsen and L McKinney) Additional Information:From Forest Research Expert:- There was a press release in October 2012 for the outbreak of Chalara and in December 4064 cases were reported (only half of which were positive cases)This research is supporting the official surveillance of Chalarafraxinea. In Nov 2012 a week long snapshot study was conducted over 10 km grid squares to establish the distribution. This Survey will follow up on this research 6 months on.At present the pathogen is found in wild trees only East of the M1, would be useful to know if it has spread West.From Survey:Already infected a large number of Ash trees across continental Europe, with a significant loss of trees anticipated in the next 20 years • First found in Britain in 2012• At time of press, there is a ban on imports and movement of AshWhy will any findings be important?• Knowledge about the distribution and extent of Chalara dieback of Ash• Knowing exactly where it is will help us to manage the spread of this diseaseFrom:ObservaTreeRealisation that a pathogen was involved came in early 2000scausal agent (Chalarafraxinea) named in 2006 other name – Hymenoscyphuspseudoalbidus in 2010Early impact Poland, Lithuania, then Scandinavian countriesSome countries 60-90% ash affected eg DenmarkDespite impact & spread not designated as quarantine organismHow did it arrive in the UK?Long distance movement: evidence this has occurred via plant trade. Disease has been found in nurseries in a number of European countriesLocal spread: wind borne spores. Evidence that at epidemic fronts (eg Norway) disease can move 20-30km per year Recent evidence of seed-borne disease, has been detected in seeds collected from symptomatic treesNot all ash species equally susceptibleMore information available on FC website http://www.forestry.gov.uk/chalara
Slide Comments:All noted on slide.Image Details:Top Left: D shaped holesTop Right:serpentine minesBottom Left: The beetleBottom Right: Fissures, natural callus formationAdditional Information:From Forestry Research Expert:This devastates trees, on the scale of the dutch elm diseaseIt is currently in Moscow, Russia and is currently spreading West. Could potentially arrive in the UK therefore want to know about these asap.From Forestry CommissionWebsite:Agrilis beetles are known as jewel beetles because of their bright colours. The Agrilis that attacks ash is related to the Agrilis that is found on oaks suffering from oak decline. However, whereas the oak Agrilis only attacks weakened trees-i.e. not a killer in its own right, the emerald ash border can attack health trees, thereby causing their deaths.An exotic beetle pest that causes significant damage to ash trees (Fraxinus spp.)What to look for:* Initial thinning or yellowing of the foliage (general or limited to certain branches).*Bark fissures, 5-10cms in length, caused by the growth of callus tissue produced by the tree in response to larval feeding. * Woodpecker activity. Woodpeckers strip away small patches of bark, so that they can extract the borers.* Larval galleries. Typical galleries meander, bending sharply and are packed with frass.* D-shaped holes, abou3 mm in diameter, produced by emerging adults. The SymptomsEAB infestations are usually difficult to detect until the symptoms become severe. Trees exhibit a general yellowing and thinning of foliage, dying branches and crown dieback, typically from the top down. Small trees can be killed in one year, but larger trees can take up to 4 years to die. Sprouting epicormic shoots, small longitudinal splits in the bark or woodpecker activity may indicate beetle presence. Characteristic serpentine insect galleries can be exposed when pieces of bark fall from damaged trees that have been infested for 1 to 2 years.Life Cycle of EABIn China the beetle develops through its full life cycle in one year over most of its range and this appears to also be the case in North America. In colder northern areas of China the cycle can take two years.The ThreatAsh is an important broadleaf tree in the UK, the second most commonly planted genus, and makes up nearly 15% of all broad-leaved woodlands. Its wood is strong with many uses including the manufacture of ladders, flooring, handles, sports goods and furniture.Although there is no evidence to date that the emerald ash borer is present in the UK, the increase in global movement of imported wood, wood packaging and dannage poses a significant risk of its accidental introduction.In the UK, ash trees can suffer from a variety of root and butt rots that can cause late flushing, thinning foliage and decline leading to eventual death, symptoms similar to those caused by the emerald ash borer. F. excelsior can also suffer from a condition called Ash dieback, involving the death of scattered twigs, branches or limbs, especially in the eastern drier parts of the country. Although not fully understood, this may be partially due to root disturbance. Trees with symptoms like these that also show any signs of infestation by the emerald ash borer should be reported immediately.More information can be found at: http://www.forestry.gov.uk/pdf/epa_emerald_ash_borer.pdf/$FILE/epa_emerald_ash_borer.pdf
Slide Comments:All noted on slide.Image DetailsTop: The caterpillarsFrom Left-Caterpillar nestCaterpillar defoliationCaterpillar hairs up close - Symptom of human health problemsAdditional Notes:From Forest Research Expert:Well established in LondonThere was a successful attempt to eradicate the caterpillars in Berkshire. This pest demonstrates the dangers of importing large trees from abroad. They came into West London on large Oak trees from the Netherlands.Native to central and Southern Europe and moving North (potentially due to climate change). Because they are moving into new environments, they pose a greater threat.There are some good You Tube clips available online.From the Forestry Commission WebsiteThe larvae, or caterpillars, of Oak processionary moth (Thaumetopoeaprocessionea, OPM) are a pest because they pose a threat to oak trees and to human and animal health. Introduced on 4-8 m tall imported oak for street landscape plantingsMajor oak defoliator - caterpillars feed on many species, including English, sessile and Turkey oak The threatOPM caterpillars can threaten the health of oak trees because they feed on the leaves. Large populations can strip whole oak trees bare of leaves, leaving them vulnerable to attack by other pests and diseases, and less able to withstand adverse environmental factors such as drought and flood.The caterpillars have thousands of tiny hairs contain an urticating, or irritating, substance called thaumetopoein, from which the species derives part of its scientific name. Contact with the hairs can cause itching skin rashes and, less commonly, sore throats, breathing difficulties and eye problems. This can happen if people or animals touch the caterpillars or their nests, or if the hairs are blown about by the wind.Outbreak stageThere are three confirmed outbreaks of breeding OPM in Great Britain, all of them in southern England:• several boroughs in West and South-West London (discovered 2006)• Bromley and Croydon Boroughs in South London (2012)• Pangbourne in West Berkshire (2010)It is no longer possible to eradicate the West and South-West London outbreak, but FC and our partners are working hard to minimise its population, spread and impact as much as possible.Managing affected treesFC advise people not to try to remove OPM caterpillars or nest themselves because of the health risks, and because to be most effective the job should be carefully timed and carried out by professionals with appropriate training and equipment. Report the presence of the pest to your , and get a professional pest control operator to remove the infestations. Your local council or our Plant Health Service can provide details of suitable pest control operators working in the area.
Slide Comments:All noted on slide.Image Details:Top: Tent like nests of caterpillarsBottom: CaterpillarAdditional Information:From Forest Research Expert:Early sightings are useful to controlCurrently just across the Channel in Normandy and Brittany, not strong fliers but they could get carried across in the wind. From the Forestry Commission WebsitePine processionary moth (PPM) is a tree and forestry pest because its larvae, or caterpillars, feed on the needles of pine trees and some other conifer tree species. In large numbers they can severely defoliate trees, weakening them and making them more susceptible to attack by other pests or diseases, or to environmental stress caused by drought or excessive moisture.PPM Is extending its range across Europe towards the English Channel- A transient population of caterpillars was found in the UK Nursery in 1995 on Scots pine plants imported from Italy.PPM, like its close relative the oak processionary moth (OPM), gets its name from its distinctive habit of moving about in nose-to-tail processions.Also like OPM, PPM caterpillars represent a public health hazard because they have thousands of hairs which contain an urticating, or irritating, protein called thaumetopoein.These hairs can be blown by the wind into contact with people and animals, resulting in painful skin irritations and rashes and, in some cases, allergic reactions in some people and animals.- PPM is not currently known to be present in the UK, but it has been extending its range across Europe towards the English Channel, and we and other plant health authorities across the UK are taking steps now to consider how the UK can best prevent, or minimise the risk of, its entry to the UK. (See "Action", below)Sightings in UKThe pest is not established in the UK, but one transient population of larvae (caterpillars) was found in a UK nursery in 1995 on Scots pine plants which had been imported from Italy in 1994. The affected trees and soil were treated, and subsequent monitoring did not detect the pest. An adult was caught in a light trap in Berkshire in 1966, but the origin of that moth was not traced.OriginIt is native to, and until recently was only found in, the Mediterranean region, North Africa and some areas of the Middle East and southern Europe.DistributionPossibly as a response to climate change, PPM has been expanding its range north through France since the 1990s, and is now breeding near Paris. Long-distance movement is thought to be associated with pupae carried in the growing medium or soil of infested plants. Climate change is thought to be responsible for the success of the moth's establishment once it arrives in regions north of its natural range.The full list of countries where it has been recorded as established is: Albania, Algeria, Austria, Bulgaria, Croatia, Cyprus, France (including Corsica), Greece (including Crete), Hungary, Italy (including Sardinia and Sicily), Libya, Macedonia, Montenegro, Morocco, Portugal, Serbia, Slovenia, Spain (including the Balearic Islands), Switzerland, Syria and Tunisia.Means of spreada. Movement of plants for planting: There is a risk of larave, or caterpillars, being moved in association with plants for planting being brought into the UK. However, the white silken nests which the caterpillars form in trees in winter are very obvious, being sometimes as big as a football. In most cases, these nests and any associated caterpillars would be clearly visible during winter and spring when plants are usually imported, greatly lowering the risk from unintentional movement of plants into the UK, as long as shippers and recipients of plants are aware of the organism.Spread by egg masses (pictured) being moved on plants for planting is considered to be a low risk, because pine trees are not usually imported and planted in the summer months, when adult moths lay their eggs, and the larvae will have emerged from the eggs before winter, when most pine plants are shipped and planted. Adult females are short lived and unlikely to remain with planting material being moved. Although thought to be a low risk, pupae (right) could be brought into the UK in the soil of pine or other host plants for planting, or with any plants which have been growing in the vicinity of infested host plants before export. Inspection is unlikely to detect pupae, which can remain in the soil for up to three years before the larvae emerge. This is the pathway by which it is believed that PPM was moved to the Paris area.There are currently no requirements for imported plants to be free of this pest. Plants for planting of many species enter the UK every year, but the volume of imports of host plants (or other plant species growing in their vicinity) with soil from areas where PPM is present is not likely to be large. The UK only imported PPM hosts (cluster pine / P. pinaster, hybrid larch / Larix x eurolepis and Scots pine/Pinussylvestris) in containers from countries in which pine processionary moth is present on six occasions between 2003 and 2012. This is a key area of uncertainty, and additional data are being sought.b. Natural Spread: Adults of both sexes can fly, and natural dispersal depends on the flight capacity of female moths, which is lower than that of males. Average female flying distance is 1.7km, with a maximum recorded of 10.5 km. This is consistent with the rate of spread recorded in the south of the Paris Basin, which has been reported as 5.6 km per year. Based on the moth's current known distribution, the risk of natural spread into the UK is still low compared to movement with plants for planting. However, its increasing northwards movement within the rest of Europe does increase the chance of natural spread to the UK.Susceptible treesPine trees (trees of the genus Pinus) are most susceptible to attack, with the following species being particularly susceptible: Austrian pine (Pinusnigra), Aleppo pine (P. halepensis), Canary Island pine (P. canariensis), lodgepole pine (P. contorta), Maritime pine (P. pinaster), Monterey or radiata pine (P. radiata), Scots pine (P. sylvestris) and stone pine (P. pinea). Other recorded hosts include the Atlas cedar (Cedrusatlantica) and European larch (Larixdecidua).Among these species, European larch, Scots pine and lodgepole pine are widely grown in the UK, although all are present. Scots pine is our only native pine.SymptomsDefoliation of needles (right) is the main symptom of PPM attack displayed by the tree itself. Complete defoliation of needles can occur where there is a high level of infestation. Otherwise the nests formed by the caterpillars in January are the most obvious signs of the moth being present. Caterpillars feed at night during the winter, when fewer people are visiting woodlands.Life-cycleThe life-cycle of PPM is different from OPM's. PPM caterpillars overwinter in tent-like nests high in pine trees, and form processions on the ground in early spring before pupating in the soil until late summer, when they emerge as adult moths. This pupal stage can, however, remain dormant, extending the life cycle over two years.The adult moths live for only about a day in the summer, during which time they mate and lay eggs in pine trees.PPM larvae, or caterpillars, hatch in autumn from the eggs laid in the summer, and begin feeding on the trees' needles in autumn.IdentificationCaterpillars: The easiest stage of the lifecycle to recognise is the larva, or caterpillar, which is hairy and coloured orange-brown with blue bands. Like its close relative the oak processionary moth (OPM), the larvae move about in nose-to-tail processions. However:OPM caterpillars often form a wedge-shaped procession, with one leader and subsequent rows containing several larvae; whilePPM caterpillars are more likely to form a single line of nose-to-tail larvae; OPM caterpillars have very long, white hairs which contrast markedly with other, shorter hairs; whilePPM caterpillars do not have extremely long hairs, instead being covered with dense clumps of hairs with less variation in length;PPM caterpillars are most likely to be seen in winter and early spring; whileOPM larvae are most likely to be seen in summer;PPM caterpillars are most likely to be seen in pine trees; whileOPM caterpillars are most likely to be seen in oak trees.Moths: Adult PPM moths have cream forewings with brown markings, and white hindwings, but to an untrained observer they are difficult to distinguish from other species of moth. They are flying about May to July, and individuals live for only about a day, during which time they must find a mate and lay their eggs in the foliage of a pine or other host tree.Nests: About January the caterpillars build distinctive, tent-like nests of white, silken, webbing up to the size of a football in the branches and foliage of pine trees, and there can be several nests in a single tree. The caterpillars spend the days in these nests, and leave them at night to forage on the trees' needles. The nests can become damaged and discoloured over time (right). Preferred trees: PPM is most likely to be found in pine trees, while OPM is most likely to be found in oak trees. Precautions - human healthShould the pest enter the UK and become established, people and animals should keep away from and not touch the caterpillars or nests. Old, abdandoned nests can still contain thousands of the irritating caterpillar hairs which can cause severe skin irritations. Parents, guardians, teachers and others responsible for children's welfare should teach them the dangers, and dog owners and walkers should keep dogs away from the caterpillars and nests.People with symptoms who thought they might have been in contact with the hairs should seek medical advice, explaining that they believed they had been in contact with PPM hairs. Similarly, pet and livestock owners whose animals displayed symptoms should consult a veterinary surgeon and explain that the animal might have been in contact with PPM hairs.Outbreak managementShould the pest be found to have entered the UK, the first response would be to try to eradicate the outbreak to prevent establishment. Using emergency powers available to us, we would issue statutory Plant Health Notices to affected tree owners requiring them to have the infestations removed. Possible treatment options include pesticide applications during the larval stage of the lifecycle, and manual removal of nests and caterpillars by trained operators.SymptomsMore information can be found at: http://www.forestry.gov.uk/forestry/INFD-924HD6
Slide Comments:All noted on slide.Image Details:Top Left: LarvaeTop Right: The AL BeetleBottom: Breeding exit holesAdditional Information:From Forest Research Expert:-There was an outbreak in Kent last year which has been eradicated. From Asia but there are outbreaks in North AmericaAssociated with wood packagingEarly sightings are important.From the Forestry Commission WebsiteAsian longhorn beetle is a native of China and is present in the Korean peninsula, and poses a serious threat to a wide range of broadleaved trees. It has caused extensive damage to trees in the USA and Italy since being accidentally introduced there in recent years.They are almost identical in appearance to citrus longhorn beetle (Anoplophorachinensis), another non-indigenous longhorn beetle that threatens trees in Britain.More information at: http://www.forestry.gov.uk/forestry/HCOU-4U4J45#action
Slide Comments:All noted on slide.Image Details:Top : LarvaeBottom: The CL BeetleAdditional Information:From Forest Research Expert:- Moves on ornamental plantsLots of interception but no outbreaksDiffers from Asian Longhorn beetle in its thorax shield and it makes holes lower on the trunks of trees.It is important that if found, to capture in a suitable container and ring Forest Research. The pest is an expensive problem to get rid of, in Lombardy they are spending 10 million Euros to eradicate it.From the Forestry Commission WebsiteThe Citrus longhorn beetle (Anoplophorachinensis) is a serious invasive pest that is found in South East Asia. EU listed quarantine pest – entry is completely banned. A minimum two-year quarantine period is required to ensure freedom. Citrus longhorn beetles can infest a very wide range of broadleaved trees and would be a major threat to horticulture and the wider environment if they became established.Very difficult to detect as eggs or when larvae are hidden in stems.Most of the Citrus longhorn beetles that have been found to date in the UK have been associated with Japanese maple trees imported from China.Serious outbreak in Italy (Lombardy)More information can be found at: http://www.fera.defra.gov.uk/plants/plantHealth/pestsDiseases/clb/index.cfm
Slide Comments:The third section: Conducting the survey…
Slide Comments:Consider the weather.Don’t carry out the survey in high windsParticipants need to be appropriately dressed and shod.Don’t work aloneCheck the area for signs of danger:Look up: Check trees for broken branches that might fall and for low hanging twigs and branchesLook down: check the ground for obstacles, prickly or stinging plants. Don’t survey at the edge of a lake or riverLook out for other site users, if forestry operations or hedge trimming is going on choose another site.We need to consider our own biosecurity. If you are surveying at more than one site, you need to clean your shoes between sites, otherwise clean your shoes when you get home.
Slide Comments:Field NotebookTakes you through the survey and is where you write down your findings.There is an additional table at the back for recording results for more trees if you decide to survey more than one.NB – additional recording sheets available to download from the OPAL website if you want to record data for more than three trees.Field ID Guide Gives s additional information on pests and diseases Has instructions for measuring crown transparency and tree heightMost unwanted Gives details on serious pests and diseases, this can be used as a stand-alone activity, particularly for people who are regularly in the field.A2 Fold-out Tree GuideTape measureA 3-5m tape is sufficient to measure most trees.ChalkA camera pictures will help confirm your records of pests and diseasesA map or GPS Smart Phoneto give a grid reference for your site,to use the Tree Health Survey Appto record a sighting of one of the most wanted on the ‘TreeA!ert’ App
Slide Comments:The fold out id guide has a key on one side together with an explanation of the terms it uses and on the other side pictures that you can use to confirm or check your id, there are also species profiles of our target species.The guide isn’t complete – particularly if you are working in parks or gardens there may be ornamental species that you won’t be able to identify from it. Tips for identifying trees:Tips for our target species:Check the ground, there may be acorns/cups or conkers/casings or ash keysleaves from last year.Oak and ash are common woodland and hedgerow trees, horse chestnut tends to be found as a planted parkland or wayside tree.Oak: has simple lobed leaves, pinate (with the veins coming from different points from a central vein)Ash – has compound leaves with pairs of untoothed leaflets. The leaves are paired on the twigs, unlike rowan which it might be mistaken for. The twigs are grey with black buds that look like little hooves.Horse chestnut – has compound palmate leaves with leaflets all coming from one point. The buds are big, shiny brown and sticky.
Slide Comments:Right at the start of the survey there are some questions asking for details of the person undertaking the survey. We are collecting some background information to help us assess the level of confidence we might have in the data. All data is important and will be used, but this information enables us to give stronger weight to results collected by those likely to be more accurate… This information also helps us understand the reach of our surveys and who is taking part.Activity 1 can be carried out on any tree, but preferably on oak, ash or horse chestnut, as this will allow you to do the full survey on one tree, and will give us a really good picture of your tree’s health.A: Site information – We want people to be as specific as possible about location. GPS is ideal. Exact trees can be pin-pointed when entering the date on our website using google maps. We also want to know what the survey area is like, and what the ground beneath the tree is covered with, as this will help us understand possible disturbance and root damage to the tree (e.g. concrete may restrict the roots, bare soil could indicate ploughing which can damage roots). Fallen leaves are important, as fungal diseases may spread from infected leaves. This data will help us see if there are patterns between site characteristics and the spread of particular pests and diseases.B: Identify your tree, using the fold out tree guide. We are encouraging people to take a photo of their tree and submit this with their results. There will be a gallery of people’s trees on the OPAL website.C: Tree Characteristics: record its girth and height (there will also be a facility on the OPAL website to estimate your tree’s age). This gives us some background info on the age and condition of the tree you are surveying and its dominance in the landscape (i.e. in relation to other trees). These are also nice, fun activities to ease people into the survey and to familiarise themselves with the tree.D: Tree Crown – section C gets you to make observations on the condition of the tree’s crown…this includes crown shape, crown density and whether there are any dead branches in the crown. For Question 13 use the crown density card in your pack, stand under the tree crown and look up to estimate the crown density. This gives us information as to whether there is any defoliation or die-back in the crown. (Defoliation is where the leaves have died, dieback is where the twigs have died so the whole branch looks bare). Question 14 asks you to look at the crown to see if there is any dead wood in the crown (i.e. branches without leaves OR twigs)E: Leaves – section E gets you to make observations about the leaves, (leaf yellowing, browning and leaf damage) – leaf browning can be caused by many different factors including insect damage and sea salt. Leaf yellowing is often a sign of a longer term issue and can indicate root damage. You are also asked to look for signs of any insect damage on the leaves of the tree.F: Wildlife – It is important that people are aware of the biodiversity value of trees (and that old trees with deadwood, cracks, splits and hollows are very valuable for wildlife). As you talked about earlier, dying is a natural part of a trees life cycle. Epiphytes and other things growing on a tree can enhance wildlife value. Section F gets you to look for signs of other wildlife or possible habitats for wildlife, on your tree.
Slide Comments:Stress the importance of photos so that any sightings can be confirmed.
Slide Comments:Stress here that it is vital they take a photo if they think they have spotted a ‘Most Unwanted’ pest or disease.People are unlikely to find most of these in their surveying – some are not yet present in the UK, but are serious so we want to make sure that if they do arrive we are able to spot them straight away. If you do think you spot one of the ‘Most Unwanted’ then it is vital you notify government officials so that the right action can be taken. You should:If you think you see one of the Most Unwanted, make sure you take a photo and submit this via the OPAL website or the Tree Alert App/ webpage…(try to get a good shot – if needed take several until you have a good one).Alert the Forestry Commission directly (through Tree A!ert App or by phoning the helpline numbers on the ‘Most Unwanted’ guideSubmit your siting through the OPAL websiteRemember there is additional info to help you identify your siting on the OPAL website and also the Forestry Commission website. If in doubt, send in your photo so an expert can verify it!NB if you think you see one of the longhorn beetles but don’t know whether it is the Asian Longhorn or Citrus Longhorn, please submit it as either as action will be required for both.It is a legal requirement that sitings of the ‘Most Unwanted’ are reported, and photos are imperative to confirm the siting. When submitting a siting, the recorder will be asked to provide contact details (part of the legal requirement for reporting one of these pests or diseases), because it is important that the relevant authority is able to follow it up.
Slide Comments:Participants will get instant feedback on the results map.This data will be sent through to OPAL and Forest Research who will analyse the data.Results can be submitted via the OPAL websiteA freepost address is also available for those without internet accessResults for Activity 1, 2 and 3 can be submitted separatelyPhotos can be uploaded with the results (maximum of 3)Try to record your location as accurately as possible, in case we need to trace the tree you surveyed…
Slide Comments: -Good crown density, leaf colour and no signs of other damage are a general indication that your tree is in good overall condition.- High levels of defoliation and/or discoloured leaves often mean that a tree is less able to produce ‘food’ and will grow at a slower rate than a healthy tree.- Oak decline and ash decline may indicate the tree is suffering a range of problems, which are weakening the tree’s overall vigour.- Weather events, climate change and human activity can influence the distribution of pests and diseases.. Your records will be added to the OPAL website and the UK central tree health database to display and help monitor the geographic distribution of reported tree pests and diseases.- Reports of our ‘Most Unwanted’ pests will allow monitoring of quarantine pests and diseases in the UK.
Slide Comment:Make sure trainees are aware of the health and safety for this session.Head outside to conduct the Tree Health Survey…