Corn rootworm resistance spreads


Corteva Agriscience has confirmed the first case of corn rootworm resistance to its Herculex trait in northeast Iowa. The company found resistance to the Herculex Cry34/35Ab1 Bt protein in a Delaware County field planted with an AcreMax Xtra product.

Corn rootworm resistance has been confirmed with three other Bt traited products with Cry3 proteins — YieldGard rootworm (Cry3Bb1), Agrisure RW (mCry3A) and Agrisure Duracade (eCry3.1Ab), noted Evan Sivesind, program manager for the Iowa Pest Resistance Management Program...

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