Potato stem that has been broken due to tunneling by a European corn borer larva (M. R. Graustein).

Wheat damage by European corn borer. One stem has frass at the first node below the white head and the adjacent right rear stem has frass but is bearing a normal-colored head (J. W. Van Duyn).

European corn borer larva infesting cotton boll (L. Jenkins).

Broken cotton stem and frass due to infestation by a European corn borer larva (L. Jenkins).

Entrance of European corn borer larvae, two pods on left, and Helicoverpa zea, three pods on right (M. R. Spellman).

Larva of European corn borer in bell pepper that has premature reddening of fruit (C. E. Mason).

European corn borer larvae chew holes in the side of a bell pepper when they exit the plant.

Frass at the stem base of a bell pepper indicates tunneling by a European corn borer larva.