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Gram pod borer - Kisan Suvidha
4847
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Gram pod borer

Gram pod borer

Gram pod borer: Helicoverpa armigera

Symptoms of damage:

  • Larvae feed on the foliage, prefers flowers and buds
  • When tender leaf buds are eaten symmetrical holes or cuttings can be seen upon unfolding of leaflets

Identification of the pest:

  • Eggs: Spherical in shape and creamy white in colour, present singly
  • Larva: Shows colour variation from greenish to brown. It has dark brown-grey lines 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. Forewings are olive green to pale brown with a dark brown circular spot in the centre. Hind wings are pale smoky white with a broad blackish outer margin.

Management:

  • Deep summer ploughing
  • Intercrop one rows of red gram for every 5 or 6 rows
  • Install pheromone trap @ 5/ha
  • Use Trichogramma chilonis @ 1 lakh/ha or Chrysoperla carnea @ 50000/ha at 40 and 50 days after sowing of groundnut can effectively check the pest
  • Apply HaNPV @ 250 LE/ha or B.t (Bacillus thuringiensis) 1 kg/ha or 5% NSKE for monitoring eggs and early instar larvae
  • Conserve the biocontrol population of spiders, long horned grasshoppers, preying mantids, robber fly, ants, green lacewing, damselflies/dragonflies, flower bugs, shield bugs, lady bird beetles, ground beetle, predatory cricket, braconids, trichogrammatids, NPV, green muscardine fungus
  • Spray any one of the following insecticide
    • quinolphos 2ml/lit of water
    • chloropyriphos 3ml/lit of water
    • Imidacloprid 2ml/lit of water.

 

Source-

  • TamilNadu Agritech Portal.

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