Stalks previously injured by cold, leaf diseases, or insects are especially susceptible to attack by these fungus. Anthracnose Favored by warm, moist conditions during the growing season. Large areas of the stalk may be blackened. Pests Corn Ear worms and silkworms are the most common pests. Insects are not often a problem until the ears begin to form.
Entry is through the silk.
Sevin dust is very effective when applied directly on the silk or dusted in the air. Occasionally birds will enjoy a meal on your corn. Blue jays are common feeders in cornfields. Occasionally a corn fungus develops on the ear and appears as a purple coloured globand once it occurs, the plant should be destroyed. .