Rice case worm

Caused by: Paraponyx stagnalis Stagnalis (Lepidoptera : Pyralidae)
Problem Category: Insect
Symptoms: Case worm larvae scraps chlorophyll from leaves. Another important symptom is the larvae cuts off leaf tips and make cylindrical tubes around them. In infected field you can see cylindrical tubes attached to plants or floating on water surface.
Comments: The damaged leaf tissue looks like ladder.
Management: Drain water to remove floating larvae from field. Follow proper cultivation practices like nitrogen application and spacing. Encourage biological control agents like snails, spiders, lady bird beetles, dragon flies in rice field.
Control: cut the chrysanthemum leaves and spread in the field so it act as insect repellant.