diseases of soybean dr. d.r. saxena r.a.k. college of agriculture, rvskvv sehore- (m.p.)
TRANSCRIPT
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Diseases of Soybean
Dr. D.R. SaxenaR.A.K. College of Agriculture, RVSKVV
SEHORE- (M.P.)
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Yellow mosaic (ihyk ekstsd
• ;g jksx Qly dh fdlh Hkh voLFkk esa izjaHk gks ldrk gS A
• ifRr;ksa ij xgjs ihys jax ds /kCcksa curs gSa ckn es lHkh iRrs ihys iM+ tkrs gSa A
• ;g jksx lQsn e[[kh }kjk QSyrk gS
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Symptoms of YMVYellow specks on young leaves
Irregular yellow & green patches & sight puckering & reduced leaf size
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Characteristic of MYMV
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Yield loss due to YMV
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Collar rot – Sclerotium rolfsi
• Mycelial growth on the collar region of the plant
• Moderately high temperature 25 ˚C
• High moisture, crop canopy, soil reaction, high organic matter, etc.
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Rhizoctonia areal blight (jkbtksDVksfu;k vaxekjh
• nks ekg dh Qly esa ;g jksx fn[kkbZ ns ldrk gS A
• fupyh ifRr;ksa ls ;g jksx vkjHk gksrk gS A
• ifRr;ksa ij dRFks jax ds /kCcs cuus yxrs gS vkSj ifRr;ksa fxjus yxrh gSaA
• jksxk.kq Ckht vkSj Hkwfe ij thfor jgrk gS A
• Rhizoctonia solani
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Charcoal rot Macrophominia phaseolina, • Infected seedling show
a reddish brown discoloration from the soil line up the stem.
• The discolored area changes from reddish brown to dark brown or black.
• Infected tissues, when split open, look as if they had been in charcoal dust.
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• Myrothecium roridum
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Brown leaf spot of soybean
• Septoria glycinesSeptoria glycines
• Septoria glycinesSeptoria glycines
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Anthraconose (Colletoricum truncatum)
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Integrated Management
1. Use of resistant/tolerant varieites For yellow mosaic prone areas select – PK 1241, PK 1189, PK 1162, PK 1158, Brag/ SL 317& 452, SL
443, SL 450 PK 416, SL 427, PKB 25, SL 457, PK 1042, PK 1135.
2. Seed treatment with Thiram + carboxin (37+37%) 2g/kg, carbendazim + thiram (1:1) 3g/kg
3. Crop rotation – Soybean should be taken only in kharif season and rotate with maize, jowar, pigeonpea
4. Use proper dose of fertilizer and specially potassium
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5. Observe the field periodically and rough out the YMV infected plants
6. Spray of insecticides like imidaclorprid or thiomethoxam 1ml/litre
7. Spray at initiation of disease or at 35 DAS:– Carbendazim 50 WP @ -.05 % or– Thiophanate methyl 70 WP @ 0.05 % or – Copper oxychloride (COC) 50 WP @ 0.2 % or – Hexaconazole 5 EC @ 0.1 %
Sprays to be repeated after 15 days.