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Crop Protection : Pests of Bengal Gram

Gram Pod Borer : Helicoverpa armigera

Identification of the pest

  • Eggs – are spherical in shape and creamy white in colour, laid singly 
  • Pupa – brown in colour, occurs in soil, leaf, pod and crop debris
  • Adult - light pale brownish yellow stout moth. 
  • Forewing grey to pale brown with V shaped speck.
  • Hind wings are pale smoky white with a broad blackish outer margin.

Symptoms of damage

  • Skeletinization of leaves – feeding chlorophyll only leaving veins by young larvae Defoliation
  • Feeds flower and green pods
  • In green pods – make circular holes and feed the grains and make empty.

Pod-borer-damage-chickpea

Circular bore hole

Management

  • ETL: 2 early instar larvae/plant 5-8 eggs/plant
  • Pheromone traps for Helicoverpa armigera 12/ha
  • Bird perches 50/ha
  • Hand picking of grown up larvae and blister beetles
  • Ha NPV 1.5 x1012 POB/ha with teepol (1 ml/lit.)
  • Apply any one of the following (Spray fluid 625 ml/ha)
  • Dichlorvos 76 WSC 625 ml/ha
  • Neem seed kernel extract 5% (31.0 kg/ha) twice followed by
  • Triazophos 40 EC 780 ml/ha
  • Neem oil 12.5 lit./ha
  • Phosalone 35 EC 1.25 lit./ha

(Note : Insecticide / Ha NPV spray should be made when the larvae were upto third instar)


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