Gram caterpillar: Helicoverpa armigera
Symptoms of damage:
- Early instar feeds on foliage
- Grown up larvae mainly bore into the fruits.
Identification of pest:
- Eggs: Are spherical in shape and creamy white in colour, laid singly
- Larva: Shows colour variation from greenish to brown
- Pupa: Brown in colour, occurs in soil, leaf, pod and crop debris
- Adult: Female is brownish yellow stout moth, Male is light greenish in colour with “V” shaped markings.
- Collect and destroy the infected fruits and grown up larvae
- Setup pheromone trap with Helilure at 15/ha
- Six releases of Trichogramma chilonis @50,000/ha per week coinciding with flowering time
- Release Chrysoperla carnea at the weekly interval at 50,000 eggs or grubs/ha from 30 DAS.
- Spray HaNPV at 1.5×1012 POB/ha along with cottonseed oil 300 g/ha to kill larvae.
- Spray carbaryl 50 WP 2 g/lit or B. thuringiensis 2 g/lit
- Provide poison bait with carbaryl 1.25 kg, rice bran 12.5 kg, jaggery 1.25 kg and water 7.5 lit/ha or spray any one of the following insecticide
- Spray any one of the following insecticides
|Emamectin benzoate 5 % SG||4 g/10 lit.|
|Flubendiamide 20 WDG||6.0 g /10 lit.|
|Indoxacarb 14.5 % SC||6.5 ml/10 lit.|
|Novaluron 10 % EC||7.5 ml/10 lit.|
|Spinosad 45 % SC||3.2 ml/10 lit.|
|Thiodicarb 75 % WP||2.0 g/lit.|
- TamilNadu Agritech Portal