DES MOINES – Iowa Secretary of Agriculture Bill Northey, Iowa State University College of Agriculture and Life Sciences Associate Dean John Lawrence and Iowa farmer Larry Buss of Logan today announced the release of the Iowa Pest Resistance Management Plan. A video of the announcement is available here.
Version 1 of the IPRMP is an Iowa-specific plan that seeks to engage farmers on the issue of pest resistance management with the goal of keeping technology and tools such as pesticides, seed treatments and biotechnology products and native traits available and effective.
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.