Insect Alert For

Corn Earworm

Risk Level:
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Alert Details

The weather pattern is predicted to remain conducive for isolated to scattered corn earworm moth flights across a good portion of the corn-growing region through most of the Labor Day weekend before a cold front passes by the end of the extended weekend. Growers with late planted or later maturing fields that may still have fresh silks and are at a susceptible stage to damage should monitor their fields very closely in the next week as new migrants may be on the way. Low risks are in place tonight into Thursday morning mainly across Nebraska and Kansas with the risk expanding north and east tomorrow night into Friday to include fields as far north as central Minnesota and east into southern Wisconsin and northwest Illinois as well as high pressure slowly begins to move to the east and south to southwest winds expand further to the east, possibly bringing some isolated flights to the north. Risks increase into the Moderate category for Friday night into Saturday especially across portions of northern Kansas, eastern Nebraska, southeast South Dakota, southern Minnesota, southwest Wisconsin, northwest Illinois, Iowa, and northern Missouri as southwest winds increase in this area. As a cold front begins pressing southeast through the Plains and upper Midwest by late Saturday into Sunday and high pressure moves into the eastern or southeastern United States, southwest winds are expected to increase and expand east so Moderate risks are predicted across the same areas as Friday night but additionally into Michigan, western Ohio, Indiana, and additional fields in Illinois by that time. A Low risk remains across the southern Great Lakes, southwest Ontario, Canada, and the eastern Midwest as far east as the Appalachian Mountains by Sunday night into Monday as the cold front continues to track southeast through the corn-growing region.