Major Insect-pests of Rice and their Management

Stem Borer:

Scientific Name:Scirpophaga Incertulas

Symptoms

The larva after hatching spend one or two days outside and then bore in to the base of stem, feed inside and characteristically cause dead hearts in vegetative stage and white ears at panicle formation stage.

Armyworm:

Scientific Name:Spodoptera Mauritia

Symptoms

• Swarming caterpillar attacks both nurseries and main field causing complete defoliation.
• In severe cases, grazed appearance was observed in the field. Larvae have a swarming habit in groups.

Case Worm:

Scientific Name:Nymphula Depunctalis Stagnalis

Symptoms

• Larva primarily eats for 2 days on young leaves after which it cuts, forms tubular cases and remain inside the case.

Rice Hispa:

Scientific Name:Dicladispa Armigera

Symptoms

The insect makes tunnels through leaf tissue causing irregular translucent white patches that are parallel to the leaf veins

Gundhi Bug:

Scientific Name:Laptocorsia Acuta

Symptoms

• Sucking the sap from individual grains, which are in milky stage.
• Individual grains become chaffy

Leaf Folder:

Scientific Name:Cnaphalocrosis Medinalis

Symptoms

• The larva folds the leaf longitudinally or horizontally by bringing together margins with silken threads and feed by staying inside the tube leading initially to whitish longitudinal streaks giving scorched appearance thereby affecting photosynthetic activity and vigour of the plant.