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
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.
Management
- ETL: 5-6 eggs or 2-3 small larvae / plant
- Bird perches @ 50 / ha
- Set up light trap
- Pheromone traps @ 12 / ha
- NPV @ 250 LE / ha + 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.
Source-
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TamilNadu Agritech Portal.
