Insect Alert For

Corn Earworm

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

A rather persistent weather pattern is predicted for much of this week and into at least early next weekend across much of the corn-growing region. High pressure is expected to remain anchored over the eastern corn-growing region while low pressure stays put in the northern Plains and into southern Canada. In between these two pressure centers, south to southwest winds will be rather common. The source region, however, across portions of Kansas, Oklahoma, and northern Texas, is not very favorable for a larger-scale moth flight. Additionally, many fields that are currently at susceptible stages to damage, most notably fresh-market and processing fields in the upper Midwest, are already seeing moderate to high corn earworm moth captures. For these reasons, only Low migration risks are in the forecast this week mainly from Kansas and central Missouri northward into Nebraska, Iowa, southeast South Dakota, southern Minnesota, and western Wisconsin. The Low risk may edge into central Minnesota and far southeast North Dakota especially Thursday night into Friday morning, and it may also extend further east into Illinois by next weekend. Growers with crops at susceptible stages to damage should continue to monitor traps and scout fields, and be prepared to take necessary action if it is warranted.