URBANA, Ill. – Illinois corn growers in the northern and central parts of the state have come to expect some rootworm damage, but University of Illinois entomologists say putting management plans in place now could help growers avoid major losses.

“Over the last few years, western corn rootworm populations with resistance to toxins present in common Bt corn hybrids have been documented in Illinois,” says Joseph Spencer, insect behaviorist at the Illinois Natural History Survey (INHS) at U of I.