Corn Borer, European, a destructive caterpillar that attacks the stalks and ears of corn. The worm is about one inch (2.5 cm) long. It is pinkish brown, with rows of small dark spots. The adult moth has yellow or brownish wings with dark bands.

Corn borers burrow inside the stalks of corn and other large-stemmed plants, weakening them and sometimes destroying the plant. In the Southern United States, there may be several generations of the pest each year. They hibernate in the dead stalks during the winter. They are controlled by shredding the stalks at the end of the growing season, which prevents the larvae from maturing into adult moths. Insecticides may be used when the corn plant is intended for fodder.

The corn borer came to the United States from Europe in 1917. It was accidentally brought into Massachusetts in a shipment of broomcorn and has since spread southward to the Gulf states and as far west as the Rocky Mountains.

The European corn borer is Ostrinia nubilalis of the family Pyralidae, order Lepidoptera.