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Management of Gram cutworm

Gram cutworm: Agrotis ipsilon (Noctuidae:Lepidoptera)

Damaging symptoms:           

  • The caterpillar hides during the day and come out in the evening for damage.
  • They remain the soil at a depth of 2-4 inches.
  • The caterpillars cut the tender plants at the base, and branches or stems of growing plants.
  • The caterpillars drag the cut parts into soil for feeding. 


Cultural Control

  • Deep summer ploughing.
  • Use well decomposed organic manure.
  • Adapt crop rotation.
  • Early sowing in the last week of October.
  • Intercropping with wheat or Linseed or Mustard reduces infestation.
  • In the early stages pick the insects and destroy.
  • Do not grow Tomato or Lady finger in near by field.
  • Grow Marigold on bunds.

Mechanical Control

  • The adult insects can be controlled by light traps.

Biological Control

  • Conserve Braconids, Microgaster sp., Bracon kitcheneri, Fileanta ruficanda (parasitods) and Broscus punctatus, Liogryllus bimaculatus (predators).

Chemical Control

  • Apply chemical insecticides only if the insect population crosses the economic threshold.
  • Spray insecticides like endosulfan 35 EC @ 1000 ml/ha.
  • Deltamethrin 2.8 EC @ 750 ml/ha.
  • Quinalphos 25 EC @ 1000 ml/ha              

In case of severe infestation

  • Spray insecticides like polytrin C-44 EC @ 1000 ml/ha.
  • Profenophos 50 EC @ 1500 ml/ha.
  • Spray insecticides like spark 36 EC at the rate of 1000 ml/ha.
  • Dilute the above in 500 - 600 liters water and spray

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