Corn insects we may see in July are European corn borer and new to northern Ohio the Western bean cutworm. See your Corn, Soybean, Wheat and Alfalfa Field Guide for images and scouting suggestions.
If you are in continuous corn, watch for Western corn rootworm. This pest has reappeared in areas of the central Corn Belt in continuous corn situations, apparently overcoming the Bt insect protection trait. Let us know if you see unexpectedly lodged corn later this summer.
Last year we had Northern corn leaf blight and Gray leaf spot appear later than normal and then get slowed by dry weather. With our wet weather, I think I am seeing gray leaf spot already on susceptible hybrids. The watch in soybeans is Frogeye leaf spot. We have too many bean-on-bean acres so look for this disease and read these comments from Anne Dorrance: http://ohioline.osu.edu/factsheet/AC-53.
Watch the Crop Observation & Recommendation Network newsletter for reports of disease and insect appearance across the state: http://corn.osu.edu.
