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EPA warns of Bt resistance in Monsanto corn

An EPA investigation has concluded that corn rootworm ( Diabrotica spp) resistance to the Bt Cry3Bb1 toxin in Monsanto's genetically modified insect-resistant corn lines is suspected in parts of four states. The review by the Insect Resistance Management (IRM) team in the Office of Pesticide Programs' Biopesticides and Pollution Prevention Division followed "unexpected damage" reports in Iowa, Illinois, Minnesota and Nebraska.



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