Crop Protection :: Pest of Red Gram
Gram pod borer: Helicoverpa armigera |
Symptoms of damage
- Defoliation in early stages
- Larva’s head alone thrust inside the pods and the rest of the body hanging out.
- Pods with round holes
- Small spots appear on the leaves. These spots increase in size and produces brown ring. In ring, lines are purple in colour.
- When the disease increases,these spots become large and interconnected with each other
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Bore holes on the pod |
Larva feeding the pod |
Damaged pod |
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Identification of the pest
- Eggs – are spherical in shape and creamy white in colour, laid singly
- Larva - shows colour variation from greenish to brown. Green with dark brown grey lines laterally on the body with lateral white lines and also has dark and pale bands.
- Pupa – brown in colour, occurs in soil, leaf, pod and crop debris
- Adult - light pale brownish yellow stout moth. Fore wing grey to pale brown with V shaped speck.Hind wings are pale smoky white with a broad blackish outer margin.
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Management
- For pod borers, raise one row of sunflower as intercrop for
every 9 rows of pigeon pea and plant maize as border crop.
- Pheromone traps for Helicoverpa armigera 12/ha
- Bird perches 50/ha
- Mechanical collection of grown up larva and blister beetle
- Ha NPV 3 x1012 POB/ha in 0.1% teepol
- Apply any one of the following insectcides:
- Azadirachtin 0.03 % WSP 2500-5000 g/ha
- Bacillus thuringiensis serovar kurstaki (3a,3b,3c) 5%WP1000-1250 g/ha
- Dimethoate 30% EC 1237 ml/ha
- Emamectin benzoate 5% SG 220 g/ha
- Indoxacarb 15.8% SC 333 ml/ha
- Chlorantraniliprole 18.5 SC 150ml/ha
- Spinosad 45%SC 125-162 ml/ha
- NSKE 5% twice followed by triazophos 0.05%
- Neem oil 2%
- Phosalone 0.07%
(Spray fluid 625 ml/ha) Note : Insecticide / Ha NPV spray
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