Insect Alert For

Corn Earworm

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

Corn earworm migration risks will be on the increase as early as tomorrow night into Wednesday morning as another cold front moves through the corn-growing region. South to southwest winds and precipitation should both increase along and east of a cold front as it begins to push into the Plains and upper Midwest tonight into tomorrow, and then southeast through the Great Lakes region and eastern corn-growing region by late week. Low risks are in place tonight mainly west of a Columbia, Missouri to Green Bay, Wisconsin line, and as far north as I-94 in Minnesota and North Dakota. Moderate risks enter the forecast tomorrow night into Wednesday morning especially for fields in northeast Missouri, eastern Iowa, far southeast Minnesota, Wisconsin, northern and central Illinois, northern Indiana, and southwest lower Michigan as the front pushes southeast. Moderate risks continue in the forecast across eastern Illinois, Indiana, Ohio, southeast lower Michigan, and southern Ontario, Canada Wednesday night into Thursday morning as the front continues to push to the southeast. Growers with crops at susceptible stages, especially fresh market and processing growers, should continue to diligently monitor traps and scout fields not only for recent flights but newly-arriving moths in the next week. Some of the flights this week may be from shorter distances, as well, as the source region continues to move north in response to crops becoming much less favorable as hosts further south.