Insect Alert For

Corn Earworm

Risk Level:
Moderate Risk Level
Affected Area:
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Alert Details

Moderate corn earworm migration risks are predicted across eastern Nebraska, northern Missouri, Iowa, southeast Minnesota, Wisconsin, and central/northern Illinois tonight into tomorrow morning. A corridor of south to southwest winds southeast of a cold front is likely into this region, originating from source regions in Texas and Oklahoma. Scattered corn earworm moth flights are possible especially into the Moderate risk area, but some more isolated flights may be found as far west as Kansas, central Nebraska, and eastern South Dakota and then as far east as into the southern Great Lakes and Indiana/Kentucky, as well. Low risks continue in the forecast tomorrow night into Thursday as the cold front moves east, with risks focusing mainly east of the I-57 corridor in eastern Illinois. Low risks then re-focus back across the Plains and western/central corn-growing region for late week and into next weekend as the next weather system and building heat regime sets up by that time. Growers with crops at susceptible stages to corn earworm damage should continue monitoring traps regularly and scouting fields as new moth appearances are expected in the next week.