Insect Alert For

Corn Rootworm

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

Corn rootworm hatch/emergence risks will continue to spread north with increasing populations and growth in areas where hatches have already occurred. The greatest risk area in the next week is located in areas where accumulated degree days for this insect are the highest and thus where the most widespread hatches will be. Fields from much of Kansas into Nebraska, northern Missouri, Iowa, Illinois, Indiana, Ohio, southeast South Dakota, southern Minnesota, southern Wisconsin, and southern lower Michigan are all in the High risk area with Moderate risks to the north and west of the High risk area including these same states as well as eastern Colorado and southern Ontario, Canada. Growers in any risk area should dig up roots and evaluate if any corn rootworm larvae are present and take appropriate action or note locations of these larvae.