description Corn earworm Overview
The corn earworm (Helicoverpa zea) is a noctuid moth described by Boddie in 1850 and a polyphagous crop pest found across the Americas. Its larvae feed on reproductive parts of many plants, especially developing corn ears, but the species also attacks cotton, tomatoes, beans, soybeans and other crops. In corn, eggs are often laid on silk and the larvae move into the ear to feed on kernels, leaving frass and reducing crop quality.
help Corn earworm FAQ
What is the corn earworm's scientific name?
The corn earworm is Helicoverpa zea, a noctuid moth described by Boddie in 1850. Its larvae are important agricultural pests across the Americas.
Which crops does the corn earworm attack?
Larvae feed on corn ears and also attack cotton, tomatoes, beans, soybeans, and other crops. The caterpillars often damage reproductive plant parts, including developing kernels and fruit.
Why is the corn earworm difficult to control?
It feeds on several plant species and can move between crops during the growing season. Control programs often need to consider scouting, crop timing, and resistance to insecticides.
Is the corn earworm the same insect as the cotton bollworm?
Yes, Helicoverpa zea is also widely called the cotton bollworm and tomato fruitworm. The common name changes with the crop being damaged.
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