Rice | Nymphula depunctalis
Nymphula depunctalis Guenee, 1854; Common Name: Rice case worm
Taxonomy Information
Kingdom
Animalia
Phylum
Arthropoda
Class
Insecta
Order
Lepidoptera
Superfamily
Pyraloidea
Family
Crambidae
Genus
Nymphula
Species
depunctalis
Author
Guenee, 1854
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Field Identification

Adult moth is small with white wings having brown wavy markings

Damage

The attack is sporadic and occurs usually in young crop located in stagnant water. The larvae cut leaf tips to make leaf cases. A ladder like appearance of skeletonised tissues. Leaves are cut at right angle as with a pair of scissors. If the leaves are disturbed, the cases along with larvae fall on water surface. This is the characteristic symptoms of case worm attack.

Key Natural Enemies

Snails are useful predators of eggs of the rice caseworm. The larvae are fed upon by the hydrophilid and dytiscid water beetles. Spiders, dragonflies, and birds eat the adults. There is a nuclear polyhedrosis virus, which is a potential control agent against the rice caseworm. Dacnusa sp., a parasitic wasp.

Related Species

Parapoynx stagnalis (Zeller, 1852)

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