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Pulse beetle (Callosobruchus chinensis) of Chickpea

Pulse beetle (Callosobruchus chinensis) of Chickpea:

Identification & Monitoring

  • Adult beetle is 3 - 4 mm long, oval shaped chockalate coloured, body is pointed towards front.
  • The adult emerges out of the pupa.
  • The size of the adult beetle depends upon the size of the infested portion of the pulse.
  • The attack is during July-August in the stores.

Damage

  • The adult and grub feed on the grain by making a small hole.
  • Infested stored seed can be recognized by the white eggs on the seed surface and the round exit holes with the 'flap' of seed coat.
  • Kabuli types are particularly susceptible.

 Cultural Control

  • Periodical exposure of the grain to sun helps to check infestations.
  • Dry the pods to optimum kernel moisture level of about 7 %.
  • Store the pods in polythene-lined gunny bags and fill the top surface of the bag with a layer of 3 cm ht. sand.
  • Mouth of bags should not be stitched or closed to avoid germination loss.
  • Care should be taken to avoid breakage
  • Broken seeds should not be stored for long periods.
  • Dust an inert substance such as ABCD (attapulgite-based clay dust)

Chemical Control

  • Dip the gunny bags in 10% malathion solution.
  • Apply E.D.B. ampulses @ 3 ml/q of seed in air tight storage structure.
  • Fumigation with aluminum phosphide protects the seed without affecting the viability.

Mechanical Control

  • Dip the old gunny bags in boiled water for 15 minutes.

Biological Control

  • Coat the seed with small quantities of vegetable oil or mix neem leaves in the stored grain.

 

 

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