Thrips:
Symptoms:
- The infected leaf turns whitish-brown in colour.
- In case of heavy infestation the leaves get dry and drop down and slowly the plant becomes leafless.
Management:
- Dusting of cow dung ash and spraying of clay suspension as asphyxiants (in small area and low incidence of sucking insects)
- Spray 0.05 % quinalphos 25 EC, or oxydemeton methyl 25 EC, or dimethoate 30 EC @ 2ml /lit at the crop age of 35-40 days and repeat after 15 days if needed.
Collar rot / Sclerotial blight:
Symptoms:
- Infection usually occurs at or just below the soil surface.
- Sudden yellowing or wilting of plants is the first symptom.
- Light brown lesions, which quickly darken, enlarge until the hypocotyl or stem is girdled.
- Leaves turn brown, dry and often cling to dead stem.
- Numerous tan to brown, spherical sclerotia form on infected plant material.
Management:
- Deep ploughing in summer.
- Crop rotation with maize or sorghum.
- Destroy infected stubble.
- Seed treatment with T. viride @4g/kg or P. fluorescens @ 10g/ kg of seed or Carbendazim or Thiram 2g/kg of seed.
Spot drenching with Carbendazim 1g/lit or P. fluorescens / T. viride 2.5 kg/ha with 50 kg FYM.
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