This document summarizes several diseases that affect okra/bhindi crops:
Fusarium wilt causes yellowing, stunting and wilting of plants. It is caused by the fungus Fusarium oxysporum f.sp. vasinfectum.
Cercospora leaf spot causes leaf spots and defoliation. It is caused by three Cercospora species which produce distinct symptoms.
Powdery mildew causes white, powdery patches on leaves which yellow and drop. It is caused by the fungus Erysiphe cichoracearum.
Yellow vein mosaic causes yellow veining and thickening of leaves. It is caused by the
Verticillium wilt is a major disease of cotton that causes 10-15% yield losses worldwide. The disease is caused by the soil-borne fungi Verticillium dahliae and V. albo-atrum. Symptoms include bronzing and yellowing of leaves along with interveinal chlorosis, eventually resulting in scorched leaf tips. Management involves crop rotation, soil solarization, and fungicide seed treatment or soil drenching with systemic fungicides like Vitavax or Organomercurials. The disease is most severe in alkaline, heavy soils with temperatures between 15-20°C.
This document summarizes information about smut of sugarcane, a major fungal disease caused by the fungus Ustilago scitaminea. The disease causes black whip-like structures to emerge from infected sugarcane stalks containing millions of black spores. High temperatures in April-May along with dry weather and water shortage lead to increased incidence of the disease. Control measures include removing infected stalks, avoiding ratooning of crops, disinfecting seed setts with fungicides, and using resistant varieties of sugarcane.
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
Brown spot is a fungal disease that infects the coleoptile, leaves, leaf sheath, panicle branches, glumes, and spikelets. Its most observable damage are the numerous big spots on the leaves which can kill the whole leaf. When infection occurs in the seed, unfilled grains or spotted or discolored seeds are formed.
dIseases of cucurbits vegetables by MD. RAMJANmohammad ramjan
This document discusses several diseases that affect cucurbit crops including anthracnose, fruit rots caused by fungi, leaf spots, fusarium wilt, downy mildew, powdery mildew, alternaria blight, rhizoctonia root rot, mosaic diseases, seed rot and damping off, bacterial leaf spot, scab, cucumber mosaic virus, gummy stem blight, watermelon mosaic virus, and cucumber green mottle mosaic virus. It provides details on symptoms for each disease and recommends control measures such as using disease-free seed and crop rotation, applying fungicides and insecticides, and removing infected plant debris.
This document discusses the early blight disease of tomatoes caused by the fungus Alternaria solani. It describes the pathogen, including its scientific classification and physical characteristics. The document outlines the disease symptoms which include brown-black leaf spots and stem lesions. It also covers the disease epidemiology, including favorable warm, wet conditions for spread. Management strategies discussed are cultural controls like crop rotation and debris removal, as well as chemical controls using fungicides applied every 15-20 days.
The document summarizes several common diseases that affect citrus plants, including powdery mildew, gummosis, diplodia gummosis, ganoderma root rot, canker, exocortis, greening, scab, tristeza, sooty mould, and storage rots. It describes the symptoms caused by each disease, the causal organisms, and recommends management practices like fungicide application, sanitation, controlling insect vectors, and maintaining good orchard conditions to control the spread of these diseases.
This document summarizes several diseases that affect okra/bhindi crops:
Fusarium wilt causes yellowing, stunting and wilting of plants. It is caused by the fungus Fusarium oxysporum f.sp. vasinfectum.
Cercospora leaf spot causes leaf spots and defoliation. It is caused by three Cercospora species which produce distinct symptoms.
Powdery mildew causes white, powdery patches on leaves which yellow and drop. It is caused by the fungus Erysiphe cichoracearum.
Yellow vein mosaic causes yellow veining and thickening of leaves. It is caused by the
Verticillium wilt is a major disease of cotton that causes 10-15% yield losses worldwide. The disease is caused by the soil-borne fungi Verticillium dahliae and V. albo-atrum. Symptoms include bronzing and yellowing of leaves along with interveinal chlorosis, eventually resulting in scorched leaf tips. Management involves crop rotation, soil solarization, and fungicide seed treatment or soil drenching with systemic fungicides like Vitavax or Organomercurials. The disease is most severe in alkaline, heavy soils with temperatures between 15-20°C.
This document summarizes information about smut of sugarcane, a major fungal disease caused by the fungus Ustilago scitaminea. The disease causes black whip-like structures to emerge from infected sugarcane stalks containing millions of black spores. High temperatures in April-May along with dry weather and water shortage lead to increased incidence of the disease. Control measures include removing infected stalks, avoiding ratooning of crops, disinfecting seed setts with fungicides, and using resistant varieties of sugarcane.
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
Brown spot is a fungal disease that infects the coleoptile, leaves, leaf sheath, panicle branches, glumes, and spikelets. Its most observable damage are the numerous big spots on the leaves which can kill the whole leaf. When infection occurs in the seed, unfilled grains or spotted or discolored seeds are formed.
dIseases of cucurbits vegetables by MD. RAMJANmohammad ramjan
This document discusses several diseases that affect cucurbit crops including anthracnose, fruit rots caused by fungi, leaf spots, fusarium wilt, downy mildew, powdery mildew, alternaria blight, rhizoctonia root rot, mosaic diseases, seed rot and damping off, bacterial leaf spot, scab, cucumber mosaic virus, gummy stem blight, watermelon mosaic virus, and cucumber green mottle mosaic virus. It provides details on symptoms for each disease and recommends control measures such as using disease-free seed and crop rotation, applying fungicides and insecticides, and removing infected plant debris.
This document discusses the early blight disease of tomatoes caused by the fungus Alternaria solani. It describes the pathogen, including its scientific classification and physical characteristics. The document outlines the disease symptoms which include brown-black leaf spots and stem lesions. It also covers the disease epidemiology, including favorable warm, wet conditions for spread. Management strategies discussed are cultural controls like crop rotation and debris removal, as well as chemical controls using fungicides applied every 15-20 days.
The document summarizes several common diseases that affect citrus plants, including powdery mildew, gummosis, diplodia gummosis, ganoderma root rot, canker, exocortis, greening, scab, tristeza, sooty mould, and storage rots. It describes the symptoms caused by each disease, the causal organisms, and recommends management practices like fungicide application, sanitation, controlling insect vectors, and maintaining good orchard conditions to control the spread of these diseases.
The document discusses several diseases that affect mango plants: anthracnose caused by Colletotrichum gloeosporioides which produces leaf spots and fruit rot; powdery mildew caused by Oidium mangiferae which affects leaves, flowers, and young fruits; mango malformation caused by Fusarium moniliforme var. subglutinans which results in stunted growth and malformed flowers and fruits; stem end rot caused by Botrydiplodia theobromae which causes rotting of the fruit; red rust caused by Cephaleurus mycoides which produces rust-colored spots on leaves; grey blight caused by Pestalotia mangiferae which causes brown leaf
This document summarizes three major diseases that affect gram (chickpea) crops: wilt, grey mould, and ascochyta blight. It describes the symptoms, causal pathogens, and disease cycles. For wilt, the symptoms include yellowing, wilting, and death of plants. It is caused by Fusarium oxysporum and spreads through soil and irrigation water. For grey mould, symptoms include flower and pod rotting. It is caused by Botrytis cineria and spreads rapidly under humid conditions. For ascochyta blight, symptoms include leaf spots and stem lesions. It is caused by Ascochyta rabiei and spreads through infected plant debris and
This document summarizes downy mildew of bajra or pearl millet. It affects crops grown in Africa and India, causing epidemics in 1970 and 1983. Symptoms appear as light green or yellow patches on leaves and ear heads. The fungus has non-septate, intercellular mycelium and elliptical sporangia. Oospores remain in soil for 5 years and cause primary infection in seedlings. Secondary infection occurs via sporangia. Favorable conditions for the fungus include high humidity, leaf moisture, and temperatures of 15-25 degrees Celsius. Management strategies include using healthy seed, removing infected plants, crop rotation, resistant varieties, and fungicide seed treatments or sprays.
This document summarizes information about ergot of bajra or pearl millet, a disease caused by the fungus Claviceps fusiformis. It affects many countries including India, where it is found in states like Delhi, Uttar Pradesh, Rajasthan, and Maharashtra. The disease appears at the flowering stage, producing pink honey-like secretions on spikelets that later form hard, brown sclerotia where grains would be. These sclerotia contain harmful alkaloids and can cause losses of up to 70%. Management strategies include using healthy seed, seed treatment, early sowing, crop rotation, removing infected plants, and fungicide sprays. Resistant varieties include RHR-
This document discusses several fungal diseases that affect basil and mint plants. For basil, it describes downy mildew, fusarium wilt, cercospora leaf spot, gray mold, and damping off/root rot. It provides details on symptoms, disease cycle, and management strategies for each disease. For mint, it discusses mint rust, leaf blight, verticillium wilt, and stolon rot, again outlining symptoms, disease cycle when relevant, and management approaches. The document serves as an informative guide to common fungal diseases of basil and mint.
1) Bacterial blight, anthracnose, wilt complex, leaf spots, and fruit rots are major diseases affecting pomegranate.
2) Bacterial blight causes irregular lesions and spots on leaves, fruits, and twigs leading to cracking and deformity. Management includes using disease-free materials and pruning disinfection.
3) Anthracnose causes sunken brown spots on leaves, flowers, and fruits eventually causing rotting. It is managed by removing plant debris and spraying fungicides.
4) Wilt complex is caused by multiple pathogens and is severe in black soils. It is managed by proper spacing, drainage, and use of healthy planting materials.
Ginger soft rot is a disease caused by bacteria that enters through contaminated seed rhizomes. It causes pre-emergence damping off if infection occurs before sprouting, and water-soaked brown lesions on the collar region if after. The lesions spread, causing above-ground parts to wilt and die while the rhizome rots into a soft, watery mass. The disease is favored by warm, wet conditions and is managed by planting disease-free rhizomes and applying bactericides.
This document summarizes several common diseases that affect aloe vera plants: base rot caused by Pectobacterium chrysanthemi bacteria, leaf spot caused by the fungus Alternaria alternata, aloe rust caused by Phakopsora pachyrhizi fungus, sooty mould caused by various fungi growing on honeydew from insects, and basal stem rot caused by Fusarium fungi. It provides details on symptoms, pathogens, and conditions that favor disease development for some of these diseases, as well as integrated disease management practices like removing infected plants, crop rotation, and fungicide spraying.
This document summarizes yellow vein mosaic disease of okra, caused by the bhindi mosaic virus 1 and hibiscus virus 1. The disease is transmitted by whiteflies and leafhoppers and affects leaves, causing vein clearing, chlorosis, and thickening. Symptoms include stunted and less productive plants with fewer, smaller, and deformed fruits. Management involves removing infected plants, controlling the insect vectors with insecticides, and growing resistant varieties.
This document summarizes several common diseases that affect chilli plants: damping-off caused by Pythium aphanidermatum, powdery mildew caused by Leveillula taurica, fruit rot and die-back caused by Colletotrichum capsici, leaf spot caused by Cercospora capsici, and bacterial spot caused by Xanthomonas Campestris Pv. vesicatoria. It describes the symptoms, etiology, mode of spread and survival, favorable conditions, and management recommendations for each disease.
This was presented by one of the group of students to our Asst. professors Mr. and Mrs. Poudel (Pathology) in 2017. By B.Sc.Ag Paklihawa IAAS campus, Full phase 6th batch
This document summarizes 26 fungal diseases that affect tomatoes. It provides the symptoms, causal organisms, and control methods for each disease. The diseases impact various tomato plant parts including leaves, stems, fruits, and roots. Common symptoms include spots, lesions, wilting, and rotting. Suggested control methods include using resistant varieties, crop rotation, sanitation, irrigation management, and fungicides. The document serves as a comprehensive reference for identifying and managing important fungal diseases of tomatoes.
This document discusses mango anthracnose, caused by the fungus Colletotrichum gloeosporioides. It causes significant post-harvest losses of mangoes worldwide, ranging from 15-70% depending on conditions. Symptoms include dark spots on leaves, flowers, fruits and stems. Humid conditions from October to November favor disease development. Integrated management includes spraying fungicides like mancozeb and using hot water or fungicide dips to treat fruits before storage.
Combination fungicides in india and their usesSubhomay Sinha
This document provides information on 12 combination/pre-mix fungicide formulations that are registered in India and their uses against plant pathogens. It describes the active ingredients and modes of action of each formulation and lists the plant diseases they are effective against. The formulations include combinations of azoxytrobin/tebuconazole, azoxystrobin/difenoconazole, boscalid/pyraclostrobin, ametoctradin/dimethomorph, captan/hexaconazole, carbendazim/mancozeb, carbendazim/flusilazole, carboxin/thiram, cymoxanil/mancozeb,
This document summarizes two fungal pathogens that cause early and late leaf spot disease in groundnuts: Mycosphaerella arachidis and Mycosphaerella berkeleyii. It describes their systematic position, symptoms, epidemiology, and management. Mycosphaerella arachidis causes early leaf spot, forming larger irregular lesions with yellow halos. Mycosphaerella berkeleyii causes late leaf spot, forming smaller circular lesions without halos. Both diseases require prolonged humidity for infection and development. Management includes cultural, chemical, and biological controls like crop rotation, fungicide application, and biocontrol agents.
1) The document discusses several diseases that affect brinjal/eggplant crops including little leaf caused by phytoplasma, bacterial wilt caused by Ralstonia solanacearum, and Phomopsis fruit rot caused by Phomopsis vexans.
2) Little leaf results in small, stunted leaves and bushy growth while bacterial wilt causes sudden wilting and death. Phomopsis causes fruit rot and blight on leaves and stems.
3) Diseases spread through vectors like jassids for little leaf and are managed through resistant varieties, crop rotation, and fungicide/insecticide sprays.
The document discusses several major fungal diseases that affect wheat crops:
1. Rusts, caused by fungi of the genus Puccinia, including stem rust, leaf rust, and stripe rust. They produce spores that can spread rapidly under wet conditions.
2. Loose smut and kernel bunt, caused by fungi that infect wheat flowers and seeds, resulting in powdery black or dark masses where healthy kernels should be.
3. Powdery mildew, caused by Erysiphe graminis, which produces white powdery growth on wheat leaves, stems, and flowers that later turns black and dries out plants.
4. Foot rot, caused by Pythium fungi in the soil
Rice blast, Rust of wheat and downy mildewDinesh Ghimire
Blast of Rice causes significant yield losses in rice. Symptoms include spindle-shaped lesions on leaves and sheaths. The fungus infects plants at all growth stages. It overwinters in crop residues or alternate hosts and spreads via airborne spores, favoring wet and humid conditions. Management involves growing resistant varieties, removing weeds, proper fertilizer use, and fungicide application.
The document provides information on diseases that affect cotton plants (Gossypium spp.), including bacterial blight, fusarium wilt, verticillium wilt, and root rot. It describes the symptoms, causal pathogens, disease cycles, and favorable conditions for each disease. Management strategies are also outlined, such as using resistant varieties, seed treatment, crop rotation, removing debris, and adjusting sowing times. The overall objective is to familiarize the reader with common cotton diseases and their control.
The document discusses several diseases that affect mango plants: anthracnose caused by Colletotrichum gloeosporioides which produces leaf spots and fruit rot; powdery mildew caused by Oidium mangiferae which affects leaves, flowers, and young fruits; mango malformation caused by Fusarium moniliforme var. subglutinans which results in stunted growth and malformed flowers and fruits; stem end rot caused by Botrydiplodia theobromae which causes rotting of the fruit; red rust caused by Cephaleurus mycoides which produces rust-colored spots on leaves; grey blight caused by Pestalotia mangiferae which causes brown leaf
This document summarizes three major diseases that affect gram (chickpea) crops: wilt, grey mould, and ascochyta blight. It describes the symptoms, causal pathogens, and disease cycles. For wilt, the symptoms include yellowing, wilting, and death of plants. It is caused by Fusarium oxysporum and spreads through soil and irrigation water. For grey mould, symptoms include flower and pod rotting. It is caused by Botrytis cineria and spreads rapidly under humid conditions. For ascochyta blight, symptoms include leaf spots and stem lesions. It is caused by Ascochyta rabiei and spreads through infected plant debris and
This document summarizes downy mildew of bajra or pearl millet. It affects crops grown in Africa and India, causing epidemics in 1970 and 1983. Symptoms appear as light green or yellow patches on leaves and ear heads. The fungus has non-septate, intercellular mycelium and elliptical sporangia. Oospores remain in soil for 5 years and cause primary infection in seedlings. Secondary infection occurs via sporangia. Favorable conditions for the fungus include high humidity, leaf moisture, and temperatures of 15-25 degrees Celsius. Management strategies include using healthy seed, removing infected plants, crop rotation, resistant varieties, and fungicide seed treatments or sprays.
This document summarizes information about ergot of bajra or pearl millet, a disease caused by the fungus Claviceps fusiformis. It affects many countries including India, where it is found in states like Delhi, Uttar Pradesh, Rajasthan, and Maharashtra. The disease appears at the flowering stage, producing pink honey-like secretions on spikelets that later form hard, brown sclerotia where grains would be. These sclerotia contain harmful alkaloids and can cause losses of up to 70%. Management strategies include using healthy seed, seed treatment, early sowing, crop rotation, removing infected plants, and fungicide sprays. Resistant varieties include RHR-
This document discusses several fungal diseases that affect basil and mint plants. For basil, it describes downy mildew, fusarium wilt, cercospora leaf spot, gray mold, and damping off/root rot. It provides details on symptoms, disease cycle, and management strategies for each disease. For mint, it discusses mint rust, leaf blight, verticillium wilt, and stolon rot, again outlining symptoms, disease cycle when relevant, and management approaches. The document serves as an informative guide to common fungal diseases of basil and mint.
1) Bacterial blight, anthracnose, wilt complex, leaf spots, and fruit rots are major diseases affecting pomegranate.
2) Bacterial blight causes irregular lesions and spots on leaves, fruits, and twigs leading to cracking and deformity. Management includes using disease-free materials and pruning disinfection.
3) Anthracnose causes sunken brown spots on leaves, flowers, and fruits eventually causing rotting. It is managed by removing plant debris and spraying fungicides.
4) Wilt complex is caused by multiple pathogens and is severe in black soils. It is managed by proper spacing, drainage, and use of healthy planting materials.
Ginger soft rot is a disease caused by bacteria that enters through contaminated seed rhizomes. It causes pre-emergence damping off if infection occurs before sprouting, and water-soaked brown lesions on the collar region if after. The lesions spread, causing above-ground parts to wilt and die while the rhizome rots into a soft, watery mass. The disease is favored by warm, wet conditions and is managed by planting disease-free rhizomes and applying bactericides.
This document summarizes several common diseases that affect aloe vera plants: base rot caused by Pectobacterium chrysanthemi bacteria, leaf spot caused by the fungus Alternaria alternata, aloe rust caused by Phakopsora pachyrhizi fungus, sooty mould caused by various fungi growing on honeydew from insects, and basal stem rot caused by Fusarium fungi. It provides details on symptoms, pathogens, and conditions that favor disease development for some of these diseases, as well as integrated disease management practices like removing infected plants, crop rotation, and fungicide spraying.
This document summarizes yellow vein mosaic disease of okra, caused by the bhindi mosaic virus 1 and hibiscus virus 1. The disease is transmitted by whiteflies and leafhoppers and affects leaves, causing vein clearing, chlorosis, and thickening. Symptoms include stunted and less productive plants with fewer, smaller, and deformed fruits. Management involves removing infected plants, controlling the insect vectors with insecticides, and growing resistant varieties.
This document summarizes several common diseases that affect chilli plants: damping-off caused by Pythium aphanidermatum, powdery mildew caused by Leveillula taurica, fruit rot and die-back caused by Colletotrichum capsici, leaf spot caused by Cercospora capsici, and bacterial spot caused by Xanthomonas Campestris Pv. vesicatoria. It describes the symptoms, etiology, mode of spread and survival, favorable conditions, and management recommendations for each disease.
This was presented by one of the group of students to our Asst. professors Mr. and Mrs. Poudel (Pathology) in 2017. By B.Sc.Ag Paklihawa IAAS campus, Full phase 6th batch
This document summarizes 26 fungal diseases that affect tomatoes. It provides the symptoms, causal organisms, and control methods for each disease. The diseases impact various tomato plant parts including leaves, stems, fruits, and roots. Common symptoms include spots, lesions, wilting, and rotting. Suggested control methods include using resistant varieties, crop rotation, sanitation, irrigation management, and fungicides. The document serves as a comprehensive reference for identifying and managing important fungal diseases of tomatoes.
This document discusses mango anthracnose, caused by the fungus Colletotrichum gloeosporioides. It causes significant post-harvest losses of mangoes worldwide, ranging from 15-70% depending on conditions. Symptoms include dark spots on leaves, flowers, fruits and stems. Humid conditions from October to November favor disease development. Integrated management includes spraying fungicides like mancozeb and using hot water or fungicide dips to treat fruits before storage.
Combination fungicides in india and their usesSubhomay Sinha
This document provides information on 12 combination/pre-mix fungicide formulations that are registered in India and their uses against plant pathogens. It describes the active ingredients and modes of action of each formulation and lists the plant diseases they are effective against. The formulations include combinations of azoxytrobin/tebuconazole, azoxystrobin/difenoconazole, boscalid/pyraclostrobin, ametoctradin/dimethomorph, captan/hexaconazole, carbendazim/mancozeb, carbendazim/flusilazole, carboxin/thiram, cymoxanil/mancozeb,
This document summarizes two fungal pathogens that cause early and late leaf spot disease in groundnuts: Mycosphaerella arachidis and Mycosphaerella berkeleyii. It describes their systematic position, symptoms, epidemiology, and management. Mycosphaerella arachidis causes early leaf spot, forming larger irregular lesions with yellow halos. Mycosphaerella berkeleyii causes late leaf spot, forming smaller circular lesions without halos. Both diseases require prolonged humidity for infection and development. Management includes cultural, chemical, and biological controls like crop rotation, fungicide application, and biocontrol agents.
1) The document discusses several diseases that affect brinjal/eggplant crops including little leaf caused by phytoplasma, bacterial wilt caused by Ralstonia solanacearum, and Phomopsis fruit rot caused by Phomopsis vexans.
2) Little leaf results in small, stunted leaves and bushy growth while bacterial wilt causes sudden wilting and death. Phomopsis causes fruit rot and blight on leaves and stems.
3) Diseases spread through vectors like jassids for little leaf and are managed through resistant varieties, crop rotation, and fungicide/insecticide sprays.
The document discusses several major fungal diseases that affect wheat crops:
1. Rusts, caused by fungi of the genus Puccinia, including stem rust, leaf rust, and stripe rust. They produce spores that can spread rapidly under wet conditions.
2. Loose smut and kernel bunt, caused by fungi that infect wheat flowers and seeds, resulting in powdery black or dark masses where healthy kernels should be.
3. Powdery mildew, caused by Erysiphe graminis, which produces white powdery growth on wheat leaves, stems, and flowers that later turns black and dries out plants.
4. Foot rot, caused by Pythium fungi in the soil
Rice blast, Rust of wheat and downy mildewDinesh Ghimire
Blast of Rice causes significant yield losses in rice. Symptoms include spindle-shaped lesions on leaves and sheaths. The fungus infects plants at all growth stages. It overwinters in crop residues or alternate hosts and spreads via airborne spores, favoring wet and humid conditions. Management involves growing resistant varieties, removing weeds, proper fertilizer use, and fungicide application.
The document provides information on diseases that affect cotton plants (Gossypium spp.), including bacterial blight, fusarium wilt, verticillium wilt, and root rot. It describes the symptoms, causal pathogens, disease cycles, and favorable conditions for each disease. Management strategies are also outlined, such as using resistant varieties, seed treatment, crop rotation, removing debris, and adjusting sowing times. The overall objective is to familiarize the reader with common cotton diseases and their control.
This document discusses major pests and diseases that affect jute production in India. It outlines several key insect pests that damage jute crops, including the jute semilooper, indigo caterpillar, jute apion, yellow mite, and red mite. Major diseases discussed include stem rot caused by Macrophomina phaseolina, anthracnose caused by Colletotrichum species, Hooghly wilt caused by Ralstonia solanacearum, black band caused by Botryodiplodia theobromae, and soft rot caused by Sclerotium rolfsii. The document emphasizes the significant losses these pests and diseases can cause to both jute
This document summarizes 15 important diseases that affect rice, including their causal organisms, symptoms, modes of spread, survival methods, and management strategies. The major fungal diseases discussed are blast, brown spot, sheath blight, sheath rot, and stem rot. The major bacterial diseases are bacterial leaf blight and bacterial leaf streak. Viral diseases covered include tungro, grassy stunt, rice dwarf, and yellow dwarf. Other diseases summarized are false smut, udbatta disease, grain discoloration, and rice khaira deficiency. For each disease, the summary provides key details about identification and control.
Integrated disease management of chilliSudeep Pandey
This document discusses integrated disease management of chilli. It describes several fungal, bacterial, viral and nematode diseases that affect chilli crops at different plant stages. These include damping off, anthracnose, bacterial leaf spot, leaf curl, frog eye leaf spot, fusarium wilt, phytophthora blight, powdery mildew, bacterial wilt, mosaic viruses, and root knot nematode. It recommends an integrated approach using cultural practices, resistant varieties, chemical control and sanitation to manage diseases and maximize chilli production.
This document summarizes several diseases that affect castor plants, including seedling blight caused by Phytophthora parasitica, leaf blight caused by Alternaria ricini, rust caused by Melampsora ricini, brown leaf spot caused by Cercospora ricinella, and powdery mildew caused by Leveillula taurica. It describes the symptoms, pathogens, disease cycles, and management strategies for each disease.
1. The document discusses several major diseases that affect clove plants, including sudden death caused by Valsa eugeniae, Sumatra or die back caused by Ralstonia syzygii, and leaf spot, twig blight and flower shedding caused by Colletotrichum gloeosporioides.
2. It provides details on the symptoms, pathogens, taxonomic classification and management of each disease. Significant losses to clove production are reported due to sudden death and Sumatra disease.
3. Other diseases mentioned include leaf rot caused by Cylindrocladium quinquiseptatum, seedling wilt caused by various fungi, little leaf caused by a phytoplas
This document provides information on diseases that affect guava plants. It discusses the symptoms, characteristics, and management of major diseases like Fusarium wilt caused by the fungus Fusarium oxysporum f. sp. psidii. It also covers other diseases such as fruit canker caused by Pestalotiopsis psidii, stem canker from Physalospora psidii, anthracnose from Gloeosporium psidii, and red rust from Cephaleuros virescens. It details the identification and environmental conditions that promote each disease, as well as cultural, biological and chemical control methods.
This document summarizes five main diseases that affect oats: leaf or crown rust caused by Puccinia coronata var. avenae, stem rust caused by Puccinia graminis sp. Tritici, Pyrenophora leaf blotch caused by Pyrenophora chaetomioides, Septoria blotch caused by Phaeosphaeria avenaria, and Barley yellow dwarf virus transmitted by aphids. It describes the pathogens, symptoms, and management strategies for each disease, which include using resistant varieties, crop rotation, fungicide or insecticide application, and controlling volunteer plants and weeds that can harbor the pathogens.
The document summarizes key pests and diseases that affect root vegetables like carrots, radishes, and turnips. It describes several diseases that affect carrots including bacterial soft rot caused by Erwinia carotovora, bacterial blight caused by Xanthomonas campestris, and Sclerotinia rot or white mold caused by Sclerotinia sclerotiorum. It also outlines major insect pests of carrots such as the aster leafhopper, flea beetle, willow carrot aphid, carrot weevil, and carrot rust fly. For radishes and turnips, it highlights diseases like Alternaria leaf spot, white rust, and anthracnose. Control and management strategies
This document summarizes several diseases that affect guava plants, including Fusarium wilt caused by the fungus Fusarium oxysporum, fruit canker caused by Pestalotiopsis psidii, stem canker caused by Physalospora psidii, anthracnose caused by Gloeosporium psidii, and red rust caused by Cephaleuros virescens. It describes the symptoms, characteristics, and management of each disease.
Vascular wilt, Anthracnose and Black arm or angular leaf spot disease of Cotton dinesh kumar pancheshwar
This document discusses three diseases that affect cotton - Fusarium wilt, anthracnose, and bacterial blight. It provides details on the symptoms, causal pathogens, disease cycles and management strategies for each disease. Fusarium wilt causes wilting and death of seedlings. Anthracnose causes spotting of bolls and stems. Bacterial blight causes leaf spots and blackening of veins and stems. The pathogens are soil-borne fungi and bacteria and infect via seed or plant debris. Management involves seed treatment, crop rotation and fungicide/antibiotic sprays.
This document discusses integrated disease management strategies for major potato diseases. It outlines 8 major potato diseases including symptoms: bacterial wilt, late blight, early blight, common scab, black scurf, black leg and soft rot, black heart, and leaf curl. It then discusses integrated disease management methods such as seed certification, biological control with antagonistic bacteria/fungi, use of resistant cultivars, chemical control, and cultural practices including sanitation, crop rotation, seed treatment, irrigation, fertilization, and harvest/storage techniques. Specific disease management strategies are recommended for different potato growth stages.
This document summarizes several diseases that affect maize:
Downy mildew causes chlorotic streaks and stunted growth. It is caused by fungi in the soil and seed. Management includes crop rotation, seed treatment, and fungicide application.
Leaf blight causes yellow-brown leaf spots and blight. The fungal pathogen survives in seeds and other hosts. Management involves seed treatment and fungicide spraying.
Rust causes powdery cinnamon-brown pustules. It is spread by uredospores on alternate hosts. Removing alternate hosts and fungicide application are recommended.
Head smut replaces tassels and ears with smut sori. It is seed and soil-borne, spreading via scler
1. The document provides information on various diseases that affect rice crops, including blast caused by Pyricularia oryzae, brown spot caused by Helminthosporium oryzae, sheath rot caused by Sarocladium oryzae, stem rot caused by Sclerotium oryzae, narrow brown leaf spot caused by Cercospora oryzae, and sheath blight caused by Rhizoctonia solani.
2. It describes the symptoms, etiology, disease cycle and favorable conditions for each disease. Management strategies provided for each include using disease-free seeds, removing weed hosts, proper fertilizer use, crop rotation, resistant varieties,
The document discusses four major diseases that affect Crossandra plants: wilt caused by Fusarium solani, stem rot caused by Rhizoctonia solani, leaf blight caused by Colletotrichum crossandrae, and Alternaria leaf spot caused by Alternaria amaranthi var. crossandrae. It describes the symptoms, pathogens, epidemiology, and management strategies for each disease. The document provides this information to educate students on identifying and controlling important diseases of Crossandra.
This document summarizes several diseases that affect wheat, including their symptoms, epidemiology, and management strategies. It discusses diseases caused by fungi (bunt, leaf blotch, powdery mildew), bacteria (bacterial streak), viruses (barley yellow dwarf virus), and their impact on wheat appearance, yield, and economic concerns. Management involves host resistance, crop rotations, seed treatments, foliar fungicides, and removing crop debris to reduce inoculum levels.
4. early and late blight of potato tomato and potato scab.pptxBhim Joshi
This document summarizes several potato and tomato diseases, including late blight, early blight, potato wart, and common scab. It describes the causal organisms, symptoms, disease cycles, epidemiology, and management practices for each disease. Late blight is caused by Phytophthora infestans and starts as small leaf spots before causing defoliation. Potato wart is caused by Synchytrium endobioticum and forms cauliflower-like growths on tubers. Common scab, caused by Streptomyces scabis, causes corky lesions on tubers. Management strategies for these diseases include crop rotations, resistant varieties, and fungicide applications.
Signatures of wave erosion in Titan’s coastsSérgio Sacani
The shorelines of Titan’s hydrocarbon seas trace flooded erosional landforms such as river valleys; however, it isunclear whether coastal erosion has subsequently altered these shorelines. Spacecraft observations and theo-retical models suggest that wind may cause waves to form on Titan’s seas, potentially driving coastal erosion,but the observational evidence of waves is indirect, and the processes affecting shoreline evolution on Titanremain unknown. No widely accepted framework exists for using shoreline morphology to quantitatively dis-cern coastal erosion mechanisms, even on Earth, where the dominant mechanisms are known. We combinelandscape evolution models with measurements of shoreline shape on Earth to characterize how differentcoastal erosion mechanisms affect shoreline morphology. Applying this framework to Titan, we find that theshorelines of Titan’s seas are most consistent with flooded landscapes that subsequently have been eroded bywaves, rather than a uniform erosional process or no coastal erosion, particularly if wave growth saturates atfetch lengths of tens of kilometers.
Candidate young stellar objects in the S-cluster: Kinematic analysis of a sub...Sérgio Sacani
Context. The observation of several L-band emission sources in the S cluster has led to a rich discussion of their nature. However, a definitive answer to the classification of the dusty objects requires an explanation for the detection of compact Doppler-shifted Brγ emission. The ionized hydrogen in combination with the observation of mid-infrared L-band continuum emission suggests that most of these sources are embedded in a dusty envelope. These embedded sources are part of the S-cluster, and their relationship to the S-stars is still under debate. To date, the question of the origin of these two populations has been vague, although all explanations favor migration processes for the individual cluster members. Aims. This work revisits the S-cluster and its dusty members orbiting the supermassive black hole SgrA* on bound Keplerian orbits from a kinematic perspective. The aim is to explore the Keplerian parameters for patterns that might imply a nonrandom distribution of the sample. Additionally, various analytical aspects are considered to address the nature of the dusty sources. Methods. Based on the photometric analysis, we estimated the individual H−K and K−L colors for the source sample and compared the results to known cluster members. The classification revealed a noticeable contrast between the S-stars and the dusty sources. To fit the flux-density distribution, we utilized the radiative transfer code HYPERION and implemented a young stellar object Class I model. We obtained the position angle from the Keplerian fit results; additionally, we analyzed the distribution of the inclinations and the longitudes of the ascending node. Results. The colors of the dusty sources suggest a stellar nature consistent with the spectral energy distribution in the near and midinfrared domains. Furthermore, the evaporation timescales of dusty and gaseous clumps in the vicinity of SgrA* are much shorter ( 2yr) than the epochs covered by the observations (≈15yr). In addition to the strong evidence for the stellar classification of the D-sources, we also find a clear disk-like pattern following the arrangements of S-stars proposed in the literature. Furthermore, we find a global intrinsic inclination for all dusty sources of 60 ± 20◦, implying a common formation process. Conclusions. The pattern of the dusty sources manifested in the distribution of the position angles, inclinations, and longitudes of the ascending node strongly suggests two different scenarios: the main-sequence stars and the dusty stellar S-cluster sources share a common formation history or migrated with a similar formation channel in the vicinity of SgrA*. Alternatively, the gravitational influence of SgrA* in combination with a massive perturber, such as a putative intermediate mass black hole in the IRS 13 cluster, forces the dusty objects and S-stars to follow a particular orbital arrangement. Key words. stars: black holes– stars: formation– Galaxy: center– galaxies: star formation
Microbial interaction
Microorganisms interacts with each other and can be physically associated with another organisms in a variety of ways.
One organism can be located on the surface of another organism as an ectobiont or located within another organism as endobiont.
Microbial interaction may be positive such as mutualism, proto-cooperation, commensalism or may be negative such as parasitism, predation or competition
Types of microbial interaction
Positive interaction: mutualism, proto-cooperation, commensalism
Negative interaction: Ammensalism (antagonism), parasitism, predation, competition
I. Mutualism:
It is defined as the relationship in which each organism in interaction gets benefits from association. It is an obligatory relationship in which mutualist and host are metabolically dependent on each other.
Mutualistic relationship is very specific where one member of association cannot be replaced by another species.
Mutualism require close physical contact between interacting organisms.
Relationship of mutualism allows organisms to exist in habitat that could not occupied by either species alone.
Mutualistic relationship between organisms allows them to act as a single organism.
Examples of mutualism:
i. Lichens:
Lichens are excellent example of mutualism.
They are the association of specific fungi and certain genus of algae. In lichen, fungal partner is called mycobiont and algal partner is called
II. Syntrophism:
It is an association in which the growth of one organism either depends on or improved by the substrate provided by another organism.
In syntrophism both organism in association gets benefits.
Compound A
Utilized by population 1
Compound B
Utilized by population 2
Compound C
utilized by both Population 1+2
Products
In this theoretical example of syntrophism, population 1 is able to utilize and metabolize compound A, forming compound B but cannot metabolize beyond compound B without co-operation of population 2. Population 2is unable to utilize compound A but it can metabolize compound B forming compound C. Then both population 1 and 2 are able to carry out metabolic reaction which leads to formation of end product that neither population could produce alone.
Examples of syntrophism:
i. Methanogenic ecosystem in sludge digester
Methane produced by methanogenic bacteria depends upon interspecies hydrogen transfer by other fermentative bacteria.
Anaerobic fermentative bacteria generate CO2 and H2 utilizing carbohydrates which is then utilized by methanogenic bacteria (Methanobacter) to produce methane.
ii. Lactobacillus arobinosus and Enterococcus faecalis:
In the minimal media, Lactobacillus arobinosus and Enterococcus faecalis are able to grow together but not alone.
The synergistic relationship between E. faecalis and L. arobinosus occurs in which E. faecalis require folic acid
PPT on Direct Seeded Rice presented at the three-day 'Training and Validation Workshop on Modules of Climate Smart Agriculture (CSA) Technologies in South Asia' workshop on April 22, 2024.
Anti-Universe And Emergent Gravity and the Dark UniverseSérgio Sacani
Recent theoretical progress indicates that spacetime and gravity emerge together from the entanglement structure of an underlying microscopic theory. These ideas are best understood in Anti-de Sitter space, where they rely on the area law for entanglement entropy. The extension to de Sitter space requires taking into account the entropy and temperature associated with the cosmological horizon. Using insights from string theory, black hole physics and quantum information theory we argue that the positive dark energy leads to a thermal volume law contribution to the entropy that overtakes the area law precisely at the cosmological horizon. Due to the competition between area and volume law entanglement the microscopic de Sitter states do not thermalise at sub-Hubble scales: they exhibit memory effects in the form of an entropy displacement caused by matter. The emergent laws of gravity contain an additional ‘dark’ gravitational force describing the ‘elastic’ response due to the entropy displacement. We derive an estimate of the strength of this extra force in terms of the baryonic mass, Newton’s constant and the Hubble acceleration scale a0 = cH0, and provide evidence for the fact that this additional ‘dark gravity force’ explains the observed phenomena in galaxies and clusters currently attributed to dark matter.
Describing and Interpreting an Immersive Learning Case with the Immersion Cub...Leonel Morgado
Current descriptions of immersive learning cases are often difficult or impossible to compare. This is due to a myriad of different options on what details to include, which aspects are relevant, and on the descriptive approaches employed. Also, these aspects often combine very specific details with more general guidelines or indicate intents and rationales without clarifying their implementation. In this paper we provide a method to describe immersive learning cases that is structured to enable comparisons, yet flexible enough to allow researchers and practitioners to decide which aspects to include. This method leverages a taxonomy that classifies educational aspects at three levels (uses, practices, and strategies) and then utilizes two frameworks, the Immersive Learning Brain and the Immersion Cube, to enable a structured description and interpretation of immersive learning cases. The method is then demonstrated on a published immersive learning case on training for wind turbine maintenance using virtual reality. Applying the method results in a structured artifact, the Immersive Learning Case Sheet, that tags the case with its proximal uses, practices, and strategies, and refines the free text case description to ensure that matching details are included. This contribution is thus a case description method in support of future comparative research of immersive learning cases. We then discuss how the resulting description and interpretation can be leveraged to change immersion learning cases, by enriching them (considering low-effort changes or additions) or innovating (exploring more challenging avenues of transformation). The method holds significant promise to support better-grounded research in immersive learning.
Authoring a personal GPT for your research and practice: How we created the Q...Leonel Morgado
Thematic analysis in qualitative research is a time-consuming and systematic task, typically done using teams. Team members must ground their activities on common understandings of the major concepts underlying the thematic analysis, and define criteria for its development. However, conceptual misunderstandings, equivocations, and lack of adherence to criteria are challenges to the quality and speed of this process. Given the distributed and uncertain nature of this process, we wondered if the tasks in thematic analysis could be supported by readily available artificial intelligence chatbots. Our early efforts point to potential benefits: not just saving time in the coding process but better adherence to criteria and grounding, by increasing triangulation between humans and artificial intelligence. This tutorial will provide a description and demonstration of the process we followed, as two academic researchers, to develop a custom ChatGPT to assist with qualitative coding in the thematic data analysis process of immersive learning accounts in a survey of the academic literature: QUAL-E Immersive Learning Thematic Analysis Helper. In the hands-on time, participants will try out QUAL-E and develop their ideas for their own qualitative coding ChatGPT. Participants that have the paid ChatGPT Plus subscription can create a draft of their assistants. The organizers will provide course materials and slide deck that participants will be able to utilize to continue development of their custom GPT. The paid subscription to ChatGPT Plus is not required to participate in this workshop, just for trying out personal GPTs during it.
The cost of acquiring information by natural selectionCarl Bergstrom
This is a short talk that I gave at the Banff International Research Station workshop on Modeling and Theory in Population Biology. The idea is to try to understand how the burden of natural selection relates to the amount of information that selection puts into the genome.
It's based on the first part of this research paper:
The cost of information acquisition by natural selection
Ryan Seamus McGee, Olivia Kosterlitz, Artem Kaznatcheev, Benjamin Kerr, Carl T. Bergstrom
bioRxiv 2022.07.02.498577; doi: https://doi.org/10.1101/2022.07.02.498577
Sexuality - Issues, Attitude and Behaviour - Applied Social Psychology - Psyc...PsychoTech Services
A proprietary approach developed by bringing together the best of learning theories from Psychology, design principles from the world of visualization, and pedagogical methods from over a decade of training experience, that enables you to: Learn better, faster!
Discovery of An Apparent Red, High-Velocity Type Ia Supernova at 𝐳 = 2.9 wi...Sérgio Sacani
We present the JWST discovery of SN 2023adsy, a transient object located in a host galaxy JADES-GS
+
53.13485
−
27.82088
with a host spectroscopic redshift of
2.903
±
0.007
. The transient was identified in deep James Webb Space Telescope (JWST)/NIRCam imaging from the JWST Advanced Deep Extragalactic Survey (JADES) program. Photometric and spectroscopic followup with NIRCam and NIRSpec, respectively, confirm the redshift and yield UV-NIR light-curve, NIR color, and spectroscopic information all consistent with a Type Ia classification. Despite its classification as a likely SN Ia, SN 2023adsy is both fairly red (
�
(
�
−
�
)
∼
0.9
) despite a host galaxy with low-extinction and has a high Ca II velocity (
19
,
000
±
2
,
000
km/s) compared to the general population of SNe Ia. While these characteristics are consistent with some Ca-rich SNe Ia, particularly SN 2016hnk, SN 2023adsy is intrinsically brighter than the low-
�
Ca-rich population. Although such an object is too red for any low-
�
cosmological sample, we apply a fiducial standardization approach to SN 2023adsy and find that the SN 2023adsy luminosity distance measurement is in excellent agreement (
≲
1
�
) with
Λ
CDM. Therefore unlike low-
�
Ca-rich SNe Ia, SN 2023adsy is standardizable and gives no indication that SN Ia standardized luminosities change significantly with redshift. A larger sample of distant SNe Ia is required to determine if SN Ia population characteristics at high-
�
truly diverge from their low-
�
counterparts, and to confirm that standardized luminosities nevertheless remain constant with redshift.
2. Alternaria Leaf spot is caused by the fungus Alternaria dauci, survives between
carrot crops as a pathogen of wild and volunteer carrot, in infected crop debris, in
the soil for up to one year and in or on contaminated seed.
Alternaria Leaf spot is also common disease of cabbage caused by fungal pathogen
A. brassicicola.
Microscopic Characteristics:
• Alternaria spp. have septate, brown hyphae.
• Conidiophores arise singly or in clusters,
usually 2-6 ,may be long or short, they are
also septate and brown in color,
occasionally producing a zigzag
appearance.
• They bear simple or branched large conidia
which have both transverse and
longitudinal septation.
PATHOGENS
3. Macroscopic Characteristics:
• Surface; Texture downy to wooly, color pale gray to olive brown on surface. May
eventually becomes covered by short, grayish, aerial hyphae.
• Reverse; Brown to Black
• Growth Rate; Rapid growth.
Hosts:
Alternaria leaf spot describes a broad
group of fungal diseases that infect
several common garden plants. As with
many common diseases, several species
of closely related fungi cause this leaf-
spotting disease. Some target specific
plants, but others strike entire plant
families. In case of brassica vegetables
such as
Cabbage
Broccoli
Cauliflower
Brussels sprouts
A. brassicicola cause Alternaria leaf
sprout.
HOSTS
4. Alternaria leaf spot symptoms first appear as
greenish brown, water-soaked lesions.
• Lesions quickly become dark brown to black with
or without yellow halos.
Under disease-favorable conditions, lesions
coalesce and cause entire leaves to become
yellow, collapse, and die.
• Older leaves are most susceptible to infection
and often the first to develop symptoms, but all
leaves can be infected.
• Petiole lesions appear like leaf lesions but are
more elongated; petiole lesions quickly kill
entire leaves.
• Disease symptoms are often confused with
Cercospora leaf spot and bacterial blight, and
microscopic examination is often necessary for
accurate diagnosis.
SYMPTOMS
5.
6. • Carrot seedlings can also be attacked
by A. dauci within 2 to 3 weeks after
emergence.
• Infected hypocotyls and upper roots
become girdled and shrivel, turning a
gray or black color.
• Seedling infection appears similar to
Pythium damping-off, but A. dauci
infection and decay is drier than that of
Pythium.
7. Cultural Control; Plant high quality seed are free of the Alternaria leaf spot
pathogen. Hot water treatment can reduce seed contamination but may reduce seed
storability and germination. Select varieties resistant or tolerant to Alternaria leaf
spot, such as ‘Orlando Gold,’ if available. Practice a three-year or longer crop
rotation to other than hosts such as small grains. Eliminate potential sources of the
pathogen by deeply burying crop debris after harvest and controlling wild and
volunteer carrot. Avoid prolonged periods of leaf wetness by avoiding dense
planting, orientating rows parallel to the prevailing wind direction, and timing
irrigations to end before dusk. Avoid overhead irrigation if possible.
Chemical Control; Fungicides are rarely necessary for Alternaria leaf spot control
in many high plain's carrot production regions, but are essential in warm, humid
environments. Disease forecast models have been developed that can improve the
timing and efficiency of sprays. Chemical controls are most effective when
combined with as many cultural control strategies as possible.
CONTROL