They fall readily to the ground when disturbed. Feeding damage reduces plants to fragments. The injury can be easily mistaken as having been caused by cutworms. These beetles destroyed large areas within isolated northeastern Kansas corn fields during 1997 and 1998. Previous to these reports, the insect had not been found damaging corn in Kansas for more than 80 years.
Healthy stands can disappear in a few days if large numbers of beetles descend on a field.
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