How beetle damages the Bitter gourd crop?
How beetle damages the Bitter gourd crop?

Insect - Beetle

Scientific Name - Aulacophora foveicollis

Identification - The dorsal part of the body of adult beetle is deep orange in colour while the ventral part is part is black.
Adult beetle is 6-8 mm long & 3.5-4 mm width in size.

Damage - It is serious pest of the bittergourd. Both the nymph and adult of this insect damage the crop.

The adult insects pierce the leaves of plants by crooking them while the nymph damage the root of the plant, underground stem and the fruits and stems adjacent to the ground.

Integrated Management -

  • The effect of pest can be reduced by early sowing of crop.
  • Always keep the field clean. Use of resistant varieties.
  • At early stage of infestation, collection & destruction of beetle should be done. Collect beetles in the early morning when the insects are sluggish.
  • Monitor the seedling twice a week to check their infestation.
  • Use of Neem oil cake in the soil is also one of the effective way to killing the pest larvae.

Control - To control, spray Carbaryl 50 WP @ 2 grams per litre or Indoxacarb 14.5 SC (1 ml) @ 2 litre of water.

For underground nymphs, use chlorpyriphos 20 EC, 2.5 litre/hectare with the irrigation.

Beetles can also be controlled by spraying Malathion 50 EC (1 ml/litre).

Author: Gopal Bhardwaj
Specialist in Horticulture