Corn Earworm, one of the worst corn pests in the United States. It is the caterpillar of a moth. The worms are found wherever corn is grown and also attack many other crops. On cotton they are called bollworms; on tomatoes, fruitworms; and on tobacco, budworms. The worms are two inches (5 cm) long. They are yellowish green with lengthwise light and dark stripes. The adult moths are white with dark spots, with a wing-spread of 11/2 inches (4 cm).

Corn earworms feed on the tassels and ears of corn, being especially harmful to sweet corn. Control of the insect is difficult when large acreages are planted. Some hybrid corn tench to its husks clasp the ear tightly. Smaller fields of sweet or seed corn can be saved by treating the silks with a mineral oil solution containing insecticides. This solution is applied to the ear of corn with an eyedropper. Other crops are protected from the worms by dusting with insecticides.

The corn earworm moth is Heliothis zea, or H. armigera, of the family Noctuidae, order Lepidoptera.

The corn earwormThe corn earworm is yellow-green with stripes. The adult moth is white with dark spots.