Search
Western Corn Rootworm Resistance to Final Bt Trait Confirmed
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.
Set goals, work to achieve them
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.
Harrison County Project Finds Local Weeds Resist Common Herbicides
Tackling pest resistance in Iowa
Resistance to pesticides, genetic traits and other control practices continues to show up in weeds, insects and disease pathogens in Iowa. If this problem isn’t addressed, crop yields will decrease, or crop production costs will increase — or both. Iowa has taken the lead on the issue by creating and implementing the Iowa Pest Resistance Management Program.
Community Collaboration--Why Pest Resistance Management must Involve Group Action
By Paul Lasley, Iowa State University Sociologist
In my last editorial I argued that group action is required if we are to effectively manage field crop pests by concluding, “Some things are too big for anyone to accomplish alone and too important not to try to do together.”
There is little doubt that productivity gains in corn and soybeans can be attributed, in part, to better pest management, which often relies upon herbicides and insecticides. However these pesticides are becoming less effective.
Community Collaboration--Lessons from a Community Project
By Paul Lasley, Iowa State University Sociologist
EPA Releases Guidance on Slowing Pest Resistance
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).
What a Community in the Heartland Can Teach Us About Resistance Management
Is there an effective way for local communities to band together to battle weeds, insects, and other pests that become resistant to treatment? To explore that question, the Weed Science Society of America (WSSA) and Entomological Society of America(ESA) organized a recent tour of a state-sponsored resistance management demonstration project in Harrison County, Iowa.
More than 70 stakeholders from across the nation participated, from researchers and policymakers to ag-industry representatives.
Weed Management Field Day to be Held in Harrison County June 18
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.