Adults are 6mm long with wing span of 15mm. Slender green coloured caterpillars cut leaf blades into length of about ½” out of which they make tubular cases with which they feed. Several tubes are seen hanging from the plants. The caterpillars often drop suddenly on the surface of water and paddle along till it reaches another plants. During heavy damage, leaves are skeletonised and appear whitish in colour.
- Drain water from the field to flush out the insects and tubular cases floating in the field.