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).

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.

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.

Fourth and fifth-stage larvae commonly tunnel into corn stalks. The tunneling can disrupt the flow of water and nutrients to from the roots to the growing parts of the plant.

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

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.

Several European corn borer larvae feeding inside a corn whorl can cause extensive shot holes in leaves.

When larvae reach the third stage, they become large enough to start tunneling. Backlit from the sun, this larva can be seen tunneling into the leaf midrib. Shot holes from earlier injury are to the right of the midrib.