Insect Alert For

Corn Earworm

Risk Level:
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Alert Details

An active weather pattern is expected across much of the corn-growing region especially late in the week and into next weekend. As a result, corn earworm migration probabilities are on the increase especially as we head into next weekend. Low risks are in place tonight primarily from Kansas and Missouri northeast into eastern Nebraska, Iowa, western Illinois, southwest Wisconsin, and southern Minnesota as weak south to southwesterly winds blow northeast in advance of a cool front. The Low risk shifts back west into South Dakota, Nebraska, and Kansas Thursday night into Friday morning as the next low pressure system and cold front develop in the Plains. This particular system should continue to intensify along the United States/Canada border going into the weekend and a rather potent cold front is expected to cross all of the corn-growing region from Saturday into Sunday. Moderate corn earworm migration risks are in place in stronger southerly flow to the east of this front Friday night into Saturday morning from Kansas and Missouri northeast through portions of Nebraska, Iowa, southeast South Dakota, Minnesota, southwest Wisconsin, northwest Illinois and then further east into the eastern Midwest, Great Lakes region, and southwest Ontario, Canada for Saturday night into Sunday morning. Growers across much of the corn-growing region should monitor their fields for new corn earworm activity as we move into next week.