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Managing Corn Insects When Growing Non-Bt Hybrids

May 4, 2019 | Posted in Seeding & Planting, Crop Protection

With lower seed costs, low rootworm populations, and premiums paid on non-GMO corn, many growers are making the switch to growing non-Bt corn hybrids. Find out how scouting can help reduce the risk of transitioning.

4 Tactics for Managing Corn Rootworm

March 30, 2016 | Posted in Crop Protection, Soil Health

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

EPA Leans on Companies to Address Corn Rootworm Resistance

February 22, 2016 | Posted in Seeding & Planting, Crop Protection

Source: Environmental Protection Agency

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.

Dig Roots and Inspect for Rootworm Damage

July 14, 2015 | Posted in Crop Protection, Soil Health

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

Scout Late-Planted Crops For Insect Activity

By Ada Szczepaniec posted on August 14, 2014 | Posted in Crop Protection

Source: South Dakota State University

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

Suspected Bt Corn Rootworm Resistance In Pennsylvania

August 11, 2014 | Posted in Crop Protection

Source: John Tooker, Penn State Extension

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.

Think Twice Before Applying Insecticides To Bt Corn Varieties

May 1, 2014 | Posted in Crop Protection

Source: John Tooker, Penn State Extension

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.

Bt-Resistant Western Corn Rootworm Confirmed In Five Illinois Counties

April 4, 2014 | Posted in Crop Protection

Source: Michael Gray, University of Illinois

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).

Mutant Corn Could Yield New Ways To Curb Rootworm

December 18, 2013 | Posted in Crop Protection

Source: Natalie van Hoose, Purdue University

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.

Iowa Farmer Perception of Corn Rootworm Resistance

September 19, 2013 | Posted in Crop Protection

Source: Erin Hodgson, Kristine Schaefer and Aaron Gassmann, Iowa State University

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.

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