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Angie Peltier

Angie Peltier
Former Extension Educator, Commercial Agriculture

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Hill and Furrow

Current topics about crop production in Western Illinois, including field crops research at the NWIARDC in Monmouth.
Figure. Corn rootworm damage.

Free corn rootworm root ratings

Posted by Angie Peltier - Insects

Western corn rootworms have been a formidable agricultural pest, causing devastating yield losses historically.

In 2003, corn hybrids expressing the transgenic Bt trait Cry3Bb1 were released for sale to the public. In 2011, several years and several additional individual and pyramided Bt traits later, populations of western corn rootworm resistant to Cry 3Bb1 were confirmed by researchers at Iowa State.

Dr. Mike Gray, Extension Entomology Specialist with the University of Illinois, has spent many years researching ways to manage this pest. In recent Bulletin articles, Dr. Gray has discussed the most recent western corn rootworm management challenges and recommendations.

At the upcoming Northwestern Illinois Agricultural Research and Demonstration Field Day on July 17th, Dr. Gray and his team will be providing free corn rootworm ratings to corn producers that are worried about the effectiveness of their current management plan. Details about how to collect and store corn roots for rating can be found HERE.


Here are recent posts on the Bulletin by Dr. Mike Gray on Western Corn Rootworm Management:

June 10, 2013: Western Corn Rootworm Hatch Confirmed in West Central Indiana

May 29, 2013: Western corn rootworm injury in First-Year Corn: A Diminished Threat?

April 25, 2013: Western corn rootworm and flooded fields (video)

April 9, 2013: Pyramided Bt Cotton and Factors Leading to Potential Compromised Longevity: Cautionary Findings for Bt Corn and Western Corn Rootworm?

April 2, 2013: Mike Gray on Bt corn and soil insecticides

March 28, 2013: Soil Insecticide Use on Bt Corn Expected to Increase this Spring Across Much of Illinois

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