Insect Alert For

Corn Earworm

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Alert Details

Corn earworm migration risks will be on the increase across much of the corn-growing region this week as a rather active but progressive weather pattern remains in place across the central United States. One cold front currently pushing through the Great Lakes region and eastern Midwest will provide a lingering Low migration risk overnight tonight into Tuesday morning as south to southwest winds remain ahead of the front. The focus thereafter shifts to the Plains as the next, potentially stronger cold front begins to advance into the Dakotas and Nebraska. Low migration risks have been hoisted for Tuesday night into Wednesday mainly west of the Mississippi River and south of US 12 in South Dakota and Minnesota as southerly winds increase to the southeast of the front. Moderate risks are then in place Wednesday and Thursday nights initially from northeast Kansas, Iowa, southeast Minnesota, and points east into Wisconsin, Illinois, northwest Indiana, and far southwest Michigan but eventually spreading into more of the Great Lakes region, Ontario, Canada, and eastern corn-growing region by Thursday night as the front moves east. Much like the early August flight, this particular event is expected to be scattered but locally intense in nature so growers especially across the central and northern corn-growing region are urged to monitor their crops for potential new moth activity by late week and into next weekend.