corn earworm

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corn earworm

insect

Also known as: cotton bollworm, tomato fruitworm, vetch worm

Written and fact-checked by The Editors of Encyclopaedia Britannica

Article History

Also called:: cotton bollworm or tomato fruitworm

Related Topics:: caterpillar

See all related content

corn earworm, larva of the moth Heliothis zea (in some classifications H. armigera; family Noctuidae). The smooth, fleshy green or brown caterpillars are serious crop pests before they pupate in the soil. Four or five generations of the pale brown adult moths (wingspan 3.5 cm [about 11/3 inches]) are produced annually. The larvae feed largely on corn (maize), especially the small kernels at the tips of the ears, and also damage tomatoes, cotton, and other seasonal crops.

This article was most recently revised and updated by Amy Tikkanen.