Insect Alert For

Corn Earworm

Risk Level:
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Alert Details

Much of the corn-growing region has the potential to see corn earworm flights occur within the next five days. With many crops either in or approaching critical growth stages, growers should be especially vigilant in scouting their fields for corn earworms and taking appropriate action if needed. Low migration risks are in place primarily across the western and northern corn-growing region the next two nights as high pressure in the Ohio River valley slowly moves westward and keeps southerly wind flow to its west and north. By late in the week and early next weekend, a rather strong cold front is predicted to move southeast through much, if not all, of the corn-growing region. This front may produce a more favorable environment for insect migration and drop-out as precipitation is predicted along the front. Moderate migration risks are predicted mainly west of a line from near Wichita, Kansas to Eau Claire, Wisconsin and south of US 12 on Thursday night into Friday. The risk spreads east into the southern Great Lakes region and eastern Midwest for Friday night into Saturday so fresh market and commercial growers especially from Michigan southward into Ohio, Indiana, Kentucky, and Illinois should monitor fields closely by late in the weekend and early next week for signs of increased corn earworm pressure.