- The adults feed by sucking milky juice of tender grains which as a result become chaff.The grains subjected to attack by rice bug alone become chaffy.Such grains turn brown and dry up.
- Due to de-sapping rains show brownish discoloured patches on the husk.The affected ear head stands erect.
Randomly mark 4 one meter sq. per 0.4 Ha. Observe five hills at random in a sq.m and count the total number of bugs without disturbing the plant and work out average per hill.