Insect Alert For

Corn Earworm

Risk Level:
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Alert Details

An active weather pattern is predicted in the next several days, and given crop stage both in corn earworm source regions and also crops at critical stages of growth further north in the corn-growing region, elevated migration risks are in place given an expected favorable weather pattern across portions of the corn-growing region this weekend. Low risks are predicted tonight into tomorrow mainly west of the I-35 and US65 corridors from Minnesota south into Iowa and Missouri. Moderate migration risks are in the picture tomorrow night into Saturday morning across northeast Nebraska, eastern South Dakota, Minnesota, and northern/western Iowa in response to stronger winds and an approaching cold front from the northwest. This Moderate risk area shifts a little east Saturday night into Sunday and is found across northern and central Iowa, southeast Minnesota, much of Wisconsin, and northern/central Illinois with Low risks east into the southern Great Lakes and eastern corn-growing region. A cold front is expected to move through much of the central and eastern corn-growing region by Monday which will greatly limit any migration risk as we head into early next week. Growers with crops at susceptible stages to damage are encouraged to monitor traps and scout fields as new and/or additional moths are possible in the days ahead.