On more developed corn, the ECB larvae may enter the ear at the base, side or the tip through the silk channel. At the end of the season, the full-grown larvae remain in the corn stalks and stubble throughout the winter. In the spring, the larvae pupate and emerge as moths in about two weeks. Look for shot-hole injury in the leaves. A treatment is recommended if 30 percent or more of plants scouted show fresh feeding injury.
Scout plants as above, look for feeding damage on the leaves and in the developing tassels.
A treatment is recommended if 15 percent or more of the plants scouted show injury. Scout plants and, as above, look for fresh feeding injury on leaves, in tassels or on the sides of ears, especially where the ears meet the stalk. Give the stalk a gentle twist near the ear to detect larvae in the stalk. A treatment is recommended if 15 percent or more of the plants scouted show fresh injury. In silking corn that has not yet been sprayed for corn earworm, a treatment is recommended to protect the silks from egg-laying ECB moths if five or more moths are caught in the pheromone traps in a week.