Diseases of mulberry and banana.pptx [Repaired].pptxthamizhselvi17
This document summarizes several diseases that affect mulberry and banana plants and provides their symptoms and management strategies. For mulberry, it discusses root rot caused by Macrophomina phaseolina, leaf rust caused by Cerotelium fici, and powdery mildew caused by Phyllactinia corylea. For banana, it outlines Panama wilt caused by Fusarium oxysporum f. sp cubense, Moko disease caused by Ralstonia solanacearum, and tip over caused by Pectobacterium carotovorum sub sp. carotovorum. It also briefly mentions several other diseases for both crops and their management.
1. The document describes 6 major diseases that affect sugarcane: red rot, smut, wilt, grassy shoot, ratoon stunting, and Pokkah Boeng.
2. It provides details on the causal organisms, symptoms, disease cycle, and management strategies for each disease.
3. The management strategies discussed include cultural practices like using disease-free seed, crop rotation and resistant varieties, physical practices like rogueing of infected plants, and chemical control using pesticides and fungicides.
This document discusses the major and minor diseases that affect groundnut (Arachis hypogaea L.). The major diseases described are tikka leaf spots (early and late leaf spot), rust, collar rot, root rot, stem rot, and bud necrosis. The causal organisms and symptoms of each disease are summarized. Some key management strategies mentioned include seed treatment, fungicide application, crop rotation, and use of resistant varieties. Minor diseases discussed more briefly include wilt, anthracnose, grey mould, and yellow mould.
This document discusses the major and minor diseases that affect groundnut (Arachis hypogaea L.). The major diseases described are tikka leaf spots (early and late leaf spot), rust, collar rot, root rot, stem rot, and bud necrosis. The causal organisms and symptoms of each disease are summarized. Some key management strategies mentioned include seed treatment, fungicide application, crop rotation, and use of resistant varieties. Minor diseases discussed more briefly include wilt, anthracnose, grey mould, and yellow mould.
Bacterial viral and phytoplasmal diseases of sugarcnae and their managementAbhijith abi
This document provides an overview of various bacterial, viral, and phytoplasmal diseases that affect sugarcane, including their symptoms, transmission, and management strategies. It describes key fungal diseases like whipsmut and red rot, bacterial diseases like ratoon stunting, red stripe, leaf scald, and gumming disease, viral diseases like sugarcane mosaic virus, and the phytoplasmal disease of grassy shoot. For each disease, the summary highlights causal organisms, symptoms, transmission methods, and recommended control approaches like using disease-free seed, removing infected plants, and hot water treatment of seeds.
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
Diseases of mulberry and banana.pptx [Repaired].pptxthamizhselvi17
This document summarizes several diseases that affect mulberry and banana plants and provides their symptoms and management strategies. For mulberry, it discusses root rot caused by Macrophomina phaseolina, leaf rust caused by Cerotelium fici, and powdery mildew caused by Phyllactinia corylea. For banana, it outlines Panama wilt caused by Fusarium oxysporum f. sp cubense, Moko disease caused by Ralstonia solanacearum, and tip over caused by Pectobacterium carotovorum sub sp. carotovorum. It also briefly mentions several other diseases for both crops and their management.
1. The document describes 6 major diseases that affect sugarcane: red rot, smut, wilt, grassy shoot, ratoon stunting, and Pokkah Boeng.
2. It provides details on the causal organisms, symptoms, disease cycle, and management strategies for each disease.
3. The management strategies discussed include cultural practices like using disease-free seed, crop rotation and resistant varieties, physical practices like rogueing of infected plants, and chemical control using pesticides and fungicides.
This document discusses the major and minor diseases that affect groundnut (Arachis hypogaea L.). The major diseases described are tikka leaf spots (early and late leaf spot), rust, collar rot, root rot, stem rot, and bud necrosis. The causal organisms and symptoms of each disease are summarized. Some key management strategies mentioned include seed treatment, fungicide application, crop rotation, and use of resistant varieties. Minor diseases discussed more briefly include wilt, anthracnose, grey mould, and yellow mould.
This document discusses the major and minor diseases that affect groundnut (Arachis hypogaea L.). The major diseases described are tikka leaf spots (early and late leaf spot), rust, collar rot, root rot, stem rot, and bud necrosis. The causal organisms and symptoms of each disease are summarized. Some key management strategies mentioned include seed treatment, fungicide application, crop rotation, and use of resistant varieties. Minor diseases discussed more briefly include wilt, anthracnose, grey mould, and yellow mould.
Bacterial viral and phytoplasmal diseases of sugarcnae and their managementAbhijith abi
This document provides an overview of various bacterial, viral, and phytoplasmal diseases that affect sugarcane, including their symptoms, transmission, and management strategies. It describes key fungal diseases like whipsmut and red rot, bacterial diseases like ratoon stunting, red stripe, leaf scald, and gumming disease, viral diseases like sugarcane mosaic virus, and the phytoplasmal disease of grassy shoot. For each disease, the summary highlights causal organisms, symptoms, transmission methods, and recommended control approaches like using disease-free seed, removing infected plants, and hot water treatment of seeds.
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
This document provides information on growing sweet corn, including climate and soil requirements, planting season and cycle, field preparation methods, fertilizer application, seed treatment for pests and diseases, irrigation needs, and management of various pests and diseases that affect sweet corn such as the African black beetle, stem borer, stem fly, pink stem borer, corn worm, ash weevil, leafhopper, aphid, shoot bug, boil smut, brown spot, damping off, fusarium cob rot, head smut, downy mildew, leaf blight, rust, viral diseases, blanking, and deficiencies of boron, calcium, copper, iron, and magnesium.
17.red rot of sugsrcane and its management practicesBhim Joshi
This document summarizes red rot, a fungal disease of sugarcane caused by Collectotrichum falcatum. The disease affects the stalks, leaves, buds and roots of sugarcane. Symptoms include reddening and hollowness of the stalk and white fungal growth. Disease spread is facilitated by infected plant debris and soilborne inoculum. Management involves crop rotation, removing infected plants, using disease-free seed, and chemical dip treatments of setts with fungicides like carbendazim before planting.
This document summarizes the symptoms, disease cycle, and management of Ergot or Sugary disease of sorghum. The key points are:
1) Symptoms include secretion of honeydew from infected florets which attracts insects helping spread the disease. Under favorable conditions, grain is replaced by cream-colored sclerotia.
2) The disease cycle involves primary infection from sclerotia producing ascospores and secondary spread via airborne and insect-borne conidia.
3) Management strategies include adjusting sowing dates to avoid flowering in wet periods, growing resistant varieties, and fungicide application.
This document discusses several diseases that affect chilli plants, including damping off caused by Pythium spp., anthracnose caused by Colletotrichum capsici, bacterial leaf spot caused by Xanthomonas campestris pv. vesicatoria, and leaf curl caused by tobacco leaf curl virus. It describes the symptoms, etiology, and integrated management strategies for these key diseases, which involve cultural practices like field sanitation, crop rotation, and resistant varieties as well as chemical control methods like seed treatment and foliar application of fungicides and bactericides. Overall, the document provides information on major chilli diseases and recommends an integrated approach to manage them economically and environmentally friendly.
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 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.
This document summarizes three common diseases that affect beans: anthracnose, rust, and yellow mosaic. Anthracnose causes sunken black spots on leaves, stems, and pods and can kill seedlings. It is caused by the fungus Colletotrichum lindemuthianum. Rust appears as small reddish-brown pustules on the lower leaf surface and is caused by the fungus Uromyces fabae. Yellow mosaic causes yellow mottling and stunting in beans and is transmitted by the whitefly Bemisia tabaci. Management of these diseases involves crop rotation, resistant varieties, and fungicide or insecticide applications to control the pathogens and vectors.
This document summarizes several diseases that affect mulberry crops including leaf spot, powdery mildew, leaf rust, root knot, and root rot diseases. It describes the causal pathogens, symptoms, factors influencing disease spread, and recommended control measures for each disease. Control measures include cultural practices like spacing, pruning and weeding as well as chemical controls using fungicides and nematicides. An integrated pest management approach is recommended to manage soil-borne diseases using both chemical and biocontrol agents.
The overall description of major diseases of Rice or Paddy crop is ellustrated in presentation. The students prepairing for Agriculture can feel helpful. Thank You!
1. The document discusses several diseases that affect betelvine crops including foot rot caused by Phytophthora parasitica var. piperina, sclerotium foot rot and wilt caused by Sclerotium rolfsii, powdery mildew caused by Oidium piperis, bacterial leaf spot caused by Xanthomonas campestris pv. betlicola, and anthracnose caused by Colletotrichum piperis.
2. It describes the symptoms, pathogens, favorable conditions, modes of spread and survival, and management practices for each disease.
3. The management strategies include removing and destroying infected plant material, applying fungicides and bactericides,
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This document discusses six diseases that affect butter bean and fava bean: anthracnose, ashy stem blight, powdery mildew, rust, and halo blight. It describes the causal organisms, symptoms, and management strategies for each disease. The causal organisms include fungi such as Colletotrichum lindemuthianum and Erysiphe polygoni, as well as the bacterium Pseudomonas phaseolicola. Common symptoms among the diseases are lesions on leaves, stems, and pods. Management involves practices like crop rotation, using disease-free seeds, and applying appropriate fungicides or bactericides.
This document summarizes several fungal, bacterial, and viral diseases that affect wheat. It describes 9 fungal diseases caused by various Puccinia, Ustilago, Tilletia, Erysiphe, and Pythium species. The diseases discussed are yellow/stripe rust, brown/leaf rust, stem/black rust, loose smut, common bunt, powdery mildew, flag smut, and foot rot. It provides details on symptoms, pathogens, life cycles, survival methods and spread, and favorable conditions for each disease. Management approaches are also mentioned. The document additionally briefly discusses 1 bacterial disease and 3 viral diseases that impact wheat.
This document summarizes several diseases that affect neem, senna, pyrethrum crops. For neem, it describes symptoms and management of phoma twig blight, powdery mildew, root rot, leaf web blight, leaf spot, and bacterial wilt. For senna, it discusses alternaria leaf spot and damping off caused by Rhizoctonia, including symptoms, etiology, and management. It also provides information on various diseases of pyrethrum including damping off, wilt, rust, leaf blotch, grey mold, fusarium wilt, and root rot.
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.
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This document discusses several major diseases that affect horticultural crops and their management. It describes the symptoms, etiology, disease cycle, and management strategies for anthracnose caused by Colletotrichum gloeosporioides in mangoes. It also discusses powdery mildew caused by Oidium mangiferae, mango malformation caused by Fusarium moniliforme var. subglutinans, red rust caused by Cephaleuros virescens, and Panama wilt caused by Fusarium oxysporum f. sp. cubense in bananas. Finally, it summarizes the moko disease caused by Ralstonia solanacearum, banana bunch
This document discusses 5 diseases that affect sugarcane:
1. Grassy shoot, caused by phytoplasma, causes tillers to be small, yellowish-white and grass-like. Management includes removing infected parts and treating healthy stock.
2. Sugarcane smut, caused by Ustilago scitaminea, appears as black whip-like structures emerging from the growing point. Management focuses on removing infected shoots and using resistant varieties.
3. Red rot, caused by Colletotrichum falcatum, causes reddening of the stalk internals and poor crop stands. Management involves removing infected shoots, treating stock, and rotating crops.
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Presentation looks at the role , relevance and importance of built and natural heritage, issues faced by heritage in the Indian context and options which can be leveraged to preserve and conserve the heritage.It also lists the challenges faced by the heritage due to rapid urbanisation, land speculation and commercialisation in the urban areas. In addition, ppt lays down the roadmap for the preservation, conservation and making value addition to the available heritage by making it integral part of the planning , designing and management of the human settlements.
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3. Symptoms:
• When diseased setts are planted they may rot before germination, or the
shoots may die after reaching a height of about 6-12 inches.
• As the setts get dried up, the reddish colour becomes black with lots of black
coloured fungal spores adhering to it.
• If infected shoots survive, they are very much stunted and chlorotic.
• Eventually the leaves may wither and the shoots wilt.
• If the affected shoots and setts are examined the central portion of the shoots
will be seen discoloured red and the contents of the sett rotting.
• When split opened, the affected setts exhibit pineapple odour.
4. Reddish discolouration in cane
Stunted growth
Yellowing and stunted
growth
Black fungal spores Ceratocytis paradoxa
5. Pathogen:
• Ceratocytis paradoxa is initially whitish, measuring about 5 mm in
diameter and colonies turn black due to the production of
chlamydospores, which are heavily pigmented, when mature.
6. MANAGEMENT STRATEGIES:
Cultural method:
• Healthy setts should be obtained from disease free fields
• Proper drainage and planting of setts in 1-2 cm depth.
• Field sanitation practices combined with chemical pre treatment of the setts
are quite effective in controlling the disease
• Avoid deep planting during monsoon season
7. Chemical method:
• Dipping the setts in 40 ppm of boron or manganese, or spraying the plants
with either of these minor elements reduces the disease intensity.
• sett treatment with fungicide like Bavistin, 0.1 per cent before planting
• Apply carbendazim @ 2gm/lit of water at the root zone area and same as
follow at 15 days interval
9. Symptoms:
• The affected canes exhibit leaf colour change, from green to orange and then to
yellow in the third or fourth leaf. Then the leaves start drying from bottom to
top.
• If the fungal spores enter the leaf sheath through the leaf midrib, then reddish
spots can be seen on the back side of the leaf midrib also.
• The external symptoms appear only after16 - 21 days after infection and drying
of entire cane takes another 10 days time.
• When the affected cane is split opened, the inner region is reddish in colour
with intermittent white tinges across the cane length.
• Sometimes, the pith inside the cane is filled with blackish brown liquid and
exhibited alchohol odour.
10. Reddish lesion on leaf midrib Orange to yellow leaf
Inner region with reddish colour
Glomerella tucumanensis
11. Pathogen:
• Red rot disease is caused by the fungus Glomerella tucumanensis. An older
name, Colletotrichum falcatum, is still preferred by some pathologists.
• Pathogen present on leaf sheaths and blades, solitary or aggregated, often
forming short lines between vascular bundles, globose, immersed, dark
brown to black 65-250 µm dia.; wall up to 8 cells thick, sclerotia on outside,
pseudoparenchymatous within, ostiole slightly papillate, circular.
12. Management strategies:
Cultural method:
• The best way to control red rot is to select setts for planting from healthy
plants in a disease- free area.
• The red rot affected field must be rotated with rice for one season and other
crops for two seasons.
• Growing of recommended resistant and moderately resistant varieties viz.,
Co 86032, Co 86249, CoSi 95071, CoG 93076, CoC 22, CoSi 6 and
CoG 5
13. Physical method:
• Removal of the affected clumps at an early stage and soil drenching
with Carbendazim 50 WP (1 gm in 1 litre of water)
• The cut ends and entire setts should be dipped in a fungicide solution, such as
one per cent Bordeaux mixture.
• If the disease is noticed in the field, the leaves and canes should be collected and
destroyed by burning.
Chemical method:
• Adopt sett treatment with Carbendazim before planting (Carbendazim 50 WP
(0.5 gm in 1 litre of water) or Carbendazim 25 DS (1gm in 1 litre of water) along
with 2.5 kg of Urea in 250 litre of water
• Use fungitoxic chemicals like Bavistan, Benomyl, Topsin and Aretan at 0.1 per
cent for 18 min. at 52ºC for dipping setts which gave almost complete
elimination of rot infection.
15. Symptoms:
• The first symptoms of the disease become apparent only when the plant has grown
for about 4-5 months.
• Then gradual yellowing and drying of foliage, shrinkage/withering of canes.
• If the affected canes are cut and examined, the pith will be Light to dark purplish
or brown discolouration of ground tissue, pithiness and boat shaped cavities in the
middle of the internodes.
• A characteristic disagreeable odour is also associated with this disease.
• Often a cottony white mycelium is seen in the pith region.
17. Pathogen:
The fungal mycelium is hyaline, septate and thin walled. The conidiophores are
simple or branched and produce single celled, hyaline, oval to elliptical
microconidia. Macroconidia are straight with 3-5 septae measuring 27-73 × 3.4-
5.2 mm. Blastoconidia are either straight, sickle shaper or pike shaped with 2-3
septae. Moreover will be found as elliptical cell shaper structure with 1.-43x3.0-
4.5 mm in size.
18. Management strategies:
Cultural method:
• Selection of healthy seed setts from disease-free area for planting
• Grow resistant varieties like Co 617 and B.P.17 are more resistant than other
varieties
• Crop rotation, managing root borer, avoiding prolonged drought and water
logging and hygienic practices.
19. Chemical Method:
Dipping the setts in 40 ppm of boron or manganese, or spraying the
plants with either of these minor elements reduces the disease intensity.
sett treatment with fungicide like Bavistin, 0.1 per cent before planting
Apply carbendazim @ 2gm/lit of water at the root zone area and same
as follow at 15 days interval
21. SYMPTOMS:
• Production of whip like structure ( 25 – 150 cm) from the growing
point of the canes.
• Whip covered by translucent silvery membrane enclosing mass of
black powdery spores.
• Initial thin canes with elongated internodes later become reduced in
length.
• Profuse sprouting of lateral buds with narrow, erect leaves especially
in ratoon crop.
23. IDENTIFICATION OF PATHOGEN:
• The fungal mycelium spores are echinulate, light brown and spherical,
measuring 6.5 – 8.5 µ in diameter.
• They germinate readily in water, producing 2-3 celled promycelia.
• Sporidia arise terminally or laterally and are hyaline, thin walled, single
celled and elliptical to linear.
.
24. MANAGEMENT STRATEGIES:
Cultural method:
• Growing of resistant and moderately resistant varieties viz., Co 86249, CoG
93076, CoC 22, CoSi 6 and CoG 5
• Discourage ratooning of the diseased crops having more than 10 per cent
infection
• Cajanus cajan can be grown as a companion crop between rows of
sugarcane, and the secondary spread of the disease is substantially reduced
25. Physical method:
• Treating the seed setts with Areated Steam Therapy (AST) at 50 ºC for 1 hour or in hot
water at 50 ºC for 30 minutes or at 52 ºC for 18 minutes
• Roguing of smut whips with gunny bags/polythene bag and dipped in boiling water for
1 hour, and diseased clums must be uprooted and burnt
Chemical method:
• Sett treatment with fungicides viz., Triadimefon @ 1gm in 1 litre of water or
Carbendazim @ 1gm in 1 litre of water for 10 minutes.
• Spray on infected stools with a small amount of a 10% solution of roundup, using a
small hand held sprayer.
• In severe cases spray the entire block with glyphosate (360 G/L) at 5-7 lit/ha
27. Symptoms:
• The earliest symptoms are small, elongated yellowish spots that are
visible on both leaf surfaces.
• The spots increase in length, turn brown to orange-brown or red-
brown in color, which coalesced and formed large, irregular necrotic
areas, thus it shows rusty appearance of leaf.
• This eventually resulted in premature death of the leaves.
29. Pathogen:
• Uredinia are elongate, reddish-brown, with capitate, hyaline to light brown
paraphyses.
• Urediniospores are thick-walled, orange-brown, obovoid, measuring 26-34 x
16-20 µm. The urediniospore surface is echinulate with 4-5 equatorial pores.
• Teliospores are dark brown and measure 30-43 x 17-23 µm, clavate, two-
celled and slightly constricted at the septum.
30. Chemical method
• Spray Tridemorph 1.0 litres or Mancozeb 2.0 kg/ha.
• Use dithane M 45 @ 2 g/lit for one spraying.
• Application of triazole or strobilurin or pyraclostrobin fungicide @ 3 g/ lit of
water.
32. • This disease affects the 5 to 6 months crop.
• Yellowing of midrib and adjacent laminar region also yellowing.
• Subsequent leaf drying along the mid rib in 3 to 5 leaves from top.
• In some cases reddish discolouration is also seen
• In severe cases drying of spindle along with leaves.
• Stunted growth of cane, particularly internodes are affected
• Identify the disease in long distance itself
• Some times in severe cases it shows the bunchy top appearance at top
of cane
• In matured cane this disease will spreads heavily
33. Pathogen:
• The virus is transmitted by aphids, Melanaphis
sacchari and Rhopalosiphum maidis, in a semi-persistent manner.
• SCYLV is a member of the Luteoviridae family. The virus is localized
within the phloem cells of the plant
YELLOWING OF LEAVES YELLOWING OF MIDRIB
35. MANAGEMENT STRATEGIES:
Cultural method:
• Selection of disease free setts for planting
• Field should be maintain with proper hygiene
• Application proper nutritional management and use resistant varieties.
• To avoid this disease first plant the setts in nursery and then transplant to
main field
• Selection of tissue culture plant especially meristem culture plant is used for
planting in field
36. Chemical method:
• Secondary transmission of the disease by insect vectors can be
controlled by application of Malathion(0.1%) or Dimecron(0.2%).
• Soil application of carbofuran @2.0 kg./ha or phorate @ 6.0 kg./ha
• Two sprayings of malathion @ 1.5 kg /ha at monthly intervals during
September and October after detrashing of dry leaves.
38. Symptoms:
• The affected plants are stunted, the stunting being most severe in stubble
and ratoon crops.
• In infected stocks, the presence of pin head like orange coloured dots of
bacteria on the internal soft tissue in the nodal region
• The setts taken from diseased plants germinate poorly and the few shoots
that are emerged grow very slowly.
40. Pathogen:
• The organism that causes RSD is, Leifsonia xyli subsp. xyli, a small aerobic
bacterium. The genus ofthe pathogen was previously called Clavibacter
Management strategies:
Cultural method:
• Select healthy setts for planting.
• Field should maintain at proper sanitation.
• Ungerminated setts should be removed and fill the gap with new setts which
should be treated before planting.
41. Mechanical method:
• Treat the setts with hot water at 50°C for about 2 hours this gives 100 per
cent control. A temperature higher than this would kill the cane and lower
temperature than the specified enables the pathogen to survive.
• Aerated steam therapy eliminates the pathogen from the infected canes.
Use of disinfectants to clean seed cutting tools which would reduce the
chance of spread of pathogen from the infected to healthy setts.
42. Chemical method:
• Chemical disinfectants that may be used on cane cutting knives
includes, Lysol, Dettol, ethanol, Mirrol and Roccal. Atleast 5 minutes
of contact with the cutting surface is needed to assure disinfection.
44. Symptoms:
• Initial symptom appears in the young crop of 3 – 4 months age as thin
papery white young leaves at the top of the cane.
• Later, white or yellow tillers appear in large number below these leaves
(profuse tillering).
• The cane becomes stunted with reduced internodal length with axillary bud
sprouting.
• This disease appears in isolated clumps.
46. Pathogen:
• The disease is caused by Mycoplasma like organisms. Mycoplasma cells
are physically small – less than 1 µm – and they are therefore difficult to
detect with a conventional microscope.
Management strategies
Cultural method:
• Growing resistant varieties viz., Co 86249, CoG 93076 and CoC 22
• Avoid ratooning if Grassy Shoot Disease incidence is more than 15 % in
the plant crop
• If disease symptoms are visible within two weeks after planting, such
plants can be replaced by healthy plants.
• Uprooted infected plants need to disposed of by burning them
47. Physical method:
• Rogue out infected plants in the secondary and commercial seed nursery.
• Treat the setts with aerated steam at 50°C for 1 hour to control primary infection.
• Treating them with hot air at 540C for 8 hours and spraying twice a month with
aphidicides.
Chemical method
• Spray dimethoate @ 1ml in 1 litre of water to control insect vector
• Apply pesticide methyl-demeton @ 2ml/lit of water for controlling aphids.