With more resistance to Bt corn occurring, Iowa State University Extension recommends growers develop a long-term integrated pest management approach for corn rootworm.

The EPA has unveiled new requirements for seed-corn manufacturers as the agency addresses growing concern over rootworm resistance to single-trait Bt corn products.

Over the next few weeks is the time growers should dig corn roots and inspect them for rootworm feeding, says Ohio State University Extension.

Planting season got off to a bumpy start this year and we may suffer a few consequences from it late this summer.

For the past few years, folks in Pennsylvania have heard reports from Midwestern states of continuous corn growers struggling to control populations of western corn rootworms that developed resistance to some Bt corn varieties.

For folks growing continuous corn, western corn rootworm is a serious pest that needs regular attention. Most growers in Pennsylvania seem to be aware of the ongoing struggle in the Midwest with populations of western corn rootworm that are resistant to some varieties of Bt corn.

On Aug. 24, 2012, in cooperation with Aaron Gassmann's laboratory, Iowa State University, the evolution of field resistance by corn rootworms to the Cry3Bb1 protein was confirmed in some problem fields located in northwestern Illinois (Henry and Whiteside Counties).

Purdue and University of Illinois researchers have discovered a novel corn mutant whose leaves are highly susceptible to attack by Western corn rootworm beetles, a pest that feeds primarily on corn silks and pollen.

Every year Iowa State University (ISU) Extension and Outreach provides private pesticide applicator training covering a variety of pesticide safety and pest management issues. In response to reported incidences of Bt-resistant corn rootworm, a series of remote "clicker" questions were developed to survey current corn rootworm management practices and assess the degree to which farmers perceived resistance in 2012.