Symptom

• Affects the crop in square and boll formation stages
• Bronzing of veins followed by interveinal chlorosis, yellowing and scorching of leaves
• Leaves exhibit drying of leaf margins and areas between veins shows “Tiger stripe symptom”
• Affected plants remain barren showing pinkish discoloration in stem and wood.

• Survive in the infected plant debris and in soils as microsclerotia up to 14 years. Seeds also carry microsclerotia and conidia in the fuzz.
• Primary spread through soil.
• Secondary spread through the contact of diseased roots to healthy ones and through dissemination of infected plant parts through irrigation water and other implements.

• Low temperature of 15-200C, low lying and ill-drained soils.
• Heavy soils with alkaline condition.
• Heavy doses of nitrogenous fertilizers.

• Remove and burn the infected plant debris in the soil after deep summer ploughing.
• Apply farm yard manure or other organic manures @4 t/ac.
• Follow mixed cropping with non-host plants to lower the soil temperature below 200C by providing shade.
• Follow crop rotation by growing paddy or lucerne or chrysanthemum for 2-3 years.
• Treat the acid-delinted seeds with Chlorothalonil at 4 g/kg of seed .
• Treat seeds with Bacillus subtilis (10g/kg) or Trichoderma asperellum @ 4 g/kg.
• Apply Trichoderma asperellum @ 1 kg/ acre, twice in the soil during sowing and 90 DAS . Multiply 1 kg of T. asperellum in 100 kg of Farm yard manure for 15 days before application.

• Online resources