Insect Alert For

Corn Rootworm

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

While some corn rootworm hatches may still be occurring in far northern areas (North Dakota, northwest Minnesota, central Ontario, Canada), the primary concern as we move into pollination is with increasing beetle emergence and potential silk clipping. Virtually the whole of the corn-growing region is included in the High risk for potential corn rootworm issues, including northeast Colorado, Kansas, Nebraska, South and North Dakota, Minnesota, Iowa, Missouri, Illinois, Wisconsin, lower Michigan, Indiana, Ohio, and into southern Ontario, Canada. Growers with crops at a susceptible stage of damage, including fresh silks, should scout fields regularly and take note of beetle populations. Pressure is likely to be quite variable this year even across adjacent fields so scouting of all susceptible fields is recommended.