European corn borer larva feeding on the side kernels and ear tip of sweet corn.

Whorl-stage susceptible corn plant of the same heritage as this one, except without the Bacillus thuringiensis,, subspeices kurstaki, gene showing damage by European corn borer (B. D. Barry).

Whorl-stage transgenic corn plant containing the Bacillus thuringiensis,, subspeices kurstaki, gene undamaged by European corn borer (B. D. Barry).

A first instar European corn borer will scrape the upper tissue from a corn leaf leaving a thin membrane or "window pane" in the leaf. Note the characteristic black head of this corn pest.

Late-stage larvae occasionally cause extensive tunneling inside corn stalks. This tunnel is nearly four inches in length.

Late-stage larva commonly scar developed corn kernels by removing the outer seed coat and feeding on the starchy endosperm.

A first instar European corn borer will scrape the upper tissue from a corn leaf leaving a thin membrane or "window pane" in the leaf.

Late-stage larvae will tunnel into all varieties of corn, including popcorn.

Late-stage larvae commonly tunnel into the earshank of commercial dent corn hybrids. Extensive tunneling, even by a single larva, may cause the ear to fall to the ground before harvest.

Late-stage larvae commonly tunnel into the earshank. Extensive tunneling may cause the ear to fall to the ground before harvest, thereby magnifying the yield loss caused by this insect.