The U.S. Environmental Protection Agency (EPA) recently released two pesticide registration notices (PRNs) that impact how technology providers, crop advisers, and producers manage resistance. These documents are in addition to a new framework to address Bt resistance in corn rootworm released in 2016. These releases, which all went through public comment, provide guidance in managing resistance and support the strategies and goals of the Iowa Pest Resistance Management Program (IPRMP).
Weed resistance is a threat to farm profitability. Hear about weed management strategies from three local weed experts: Iowa State University Extension Weed Scientist Bob Hartzler, Iowa Soybean Association Sr. Director of Research Ed Anderson and Mike Weber, Sr. Tech Services Representative for Bayer Crop Sciences.
AMES, Iowa — Harrison County is home to a new project focused on combating weed resistance as part of a statewide pest resistance management program led by Iowa State University.
LOGAN, IOWA—The Harrison County Herbicide Resistance Project will hold a field day Monday, June 18th. Join us from 9:30 am to 11:00 am at the corn test plot at the farm operated by Larry Meyer southwest of Modale to observe weed management field trials and learn about implications for resistance management. This event is free and open to the public. Refreshments will be provided.
Harrison County was the site of three recent events highlighting local efforts addressing herbicide resistance.
Corteva Agriscience recently confirmed resistance to the Cry34/35Ab1 Bt protein in Delaware County.
Three of four Bt traits targeting corn rootworm (Cry3Bb1/Yieldguard rootworm; mCry3A/Agrisure RW; and eCry3.1Ab + mCry3A/Agrisure Duracade) are not reliable for rootworm control due to widespread resistance. Due to a reduction in effectiveness of the Cry3 proteins, farmers have come to rely upon Cry34/35Ab1 for rootworm protection, placing significant selection pressure on this trait.
Larry leads the Iowa Pest Resistance Management Program in Harrison County, which focuses on pest resistance.
“We’ve had the privilege of working with Larry on creation, development and implementation of the Iowa Pest Resistance Management Program for the past four years. Larry has been a leader in the Iowa program from its inception in 2015,” says Evan Sivesind, program manager at ISU.