Insect Alert For

Corn Earworm

Risk Level:
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Alert Details

An active and variable weather pattern this week into next weekend will likely keep the corn earworm migration risks in the forecast on a daily basis with an increased risk of flights entering into the forecast especially by next weekend when a cold front begins to push southeast through the corn growing region. As a heat dome begins to develop across the central Plains early in the period, Low risks are found tonight into tomorrow morning from mainly US 65 west and south of I-90, or from southern South Dakota into southwest Minnesota and points south. Low risks continue tomorrow night into Wednesday morning for fields located mainly west of a line from east of Springfield, Missouri to near Green Bay, Wisconsin, and then along and south of I-94 all the way north into Minnesota and eastern North Dakota. By the middle to end of the week, Low risks do eventually expand further to the east into the Great Lakes region and as a cold front commences its push southeast by the end of the week and into next weekend, Moderate risks are found from northern Missouri into eastern Nebraska, Iowa, Minnesota, Wisconsin, and northern Illinois as southerly winds are likely to originate in more favorable source regions across the mid-south by that time. Growers with crops at susceptible stages to growth are encouraged to continue to monitor traps and take appropriate action when and where needed as multiple opportunities for isolated to eventually scattered moth flights will be possible in the week ahead.