Insect Alert For

Corn Earworm

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Alert Details

A rather quick-moving low pressure system and attendant cold front is expected to track from the Plains states into the Great Lakes region over the next 48 hours or so. Once the cold front passes near or south of I-80 by Sunday, the front is expected to slow down but the overall system is likely to weaken, which will also lessen the corn earworm migration threat due to slower wind speeds south of the front. Before then, however, Low migration risks are predicted tonight into tomorrow from Kansas, Nebraska, and far southeast South Dakota into Minnesota, Iowa, Missouri, Wisconsin, and Illinois as south to southwest winds will be present east of the cold front pushing through the Plains states. Tomorrow into Sunday, Low risks then focus mainly along/south of I-80 west of Lake Michigan and then further northeast into southern lower Michigan and far southwest Ontario, Canada and adjacent areas of the eastern corn-growing region southeast of the front where mainly isolated moth flights will be possible. After Sunday, however, any southerly winds should be confined to the far southern corn-growing region and source regions south of there, so little to no risk is predicted at this time into early next week. Growers with crops at susceptible stages to corn earworm damage, however, should monitor traps and scout fields as flights likely occurred in some areas in the last week to ten days.