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Agritech Archive

Production · Protection · Nutrients · Water
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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.

Management:

  • 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 weekly interval at 50,000 eggs or grubs / ha from 30 DAS.
  • Spray HaNPV at 1.5x10 12 POB/ha along with cotton seed 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
InsecticideDose
Emamectin benzoate 5 % SG4 g/10 lit.
Flubendiamide 20 WDG6.0 g /10 lit.
Indoxacarb 14.5 % SC6.5 ml/10 lit.
Novaluron 10 % EC7.5 ml/10 lit.
Spinosad 45 % SC3.2 ml/10 lit.
Thiodicarb 75 % WP2.0 g/lit.