Soybean Collar rot / Sclerotial blight: Sclerotium rolfsii.
Symptom:
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Infection usually occurs at or just below the soil surface.
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Sudden yellowing or wilting of plants is the first symptom.
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Light brown lesions, which quickly darken, enlarge until the hypocotyl or stem is girdled.
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Leaves turn brown, dry and often cling to the dead stem.
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Numerous tan to brown, spherical sclerotia forms on infected plant material.
Management:
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Deep ploughing in summer.
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Crop rotation with maize or sorghum.
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Destroy infected stubble.
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Seed treatment with T. viride @4g/kg or P. fluorescens @ 10g/ kg of seed or Carbendazim or Thiram 2g/kg of seed.
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Spot drenching with Carbendazim 1g/lit or P. fluorescens / T. viride 2.5 kg/ha with 50 kg FYM.
Source-
- TamilNadu Agritech Portal
