Insect Alert For

Corn Earworm

Risk Level:
Low Risk
Affected Area:
Full page
Alert Details

An active weather pattern is expected this weekend and into early next week, and the first elevated Moderate corn earworm migration risk is in the forecast tomorrow night into Sunday morning across important parts of the corn-growing region as a result of this active pattern. Before tomorrow night, however, Low risks are predicted from Kansas, Missouri, and southern Illinois north as far as eastern South Dakota, Minnesota, and Wisconsin, with risks potentially as far east as southwest lower Michigan and Indiana. The main risk window, however, is tomorrow into Sunday morning especially across eastern Iowa, central/northern Illinois, and into Wisconsin as a rather strong southerly wind regime sets up directly from source regions in the mid-south region. With an approaching cold front coming in from the west, at least scattered precipitation is anticipated and a Moderate risk is in place across the aforementioned region with Low risks as far east as southern Ontario, Canada and into Ohio. The front is expected to stall between I-70 and I-80 by late in the weekend and early next week, and usually in such situations the front actually gets shunted a little further south than that as successive organized precipitation areas move through along it, so any migration risk early next week mainly focuses across the southern corn-growing region in Kansas and Missouri but there could be some isolated flights as far north as the US 20 corridor, as well. Growers should be monitoring traps and scouting those fields at susceptible stages to damage as some flights have occurred in some areas in the last week or so, and additional flights are possible over the next few days.