Bacillus thuringiensis strain PS149B1 produces binary insecticidal crystal proteins named Cry34Ab1/Cry35Ab1. This trait is under commercial development through a collaborative research effort between Pioneer Hi-Bred/DuPont and Dow AgroSciences LLC. Maize hybrids expressing Cry34Ab1/Cry35Ab1 insecticidal crystal proteins are being developed for control of larval stage corn rootworm. Effect of this trait on corn rootworm larvae was evaluated using a laboratory seedling assay system. This test system relies on measures of larval fitness over sequential sample points. Preliminary results suggest roots expressing Cry34Ab1/Cry35Ab1 are protected from damage by all instars. These findings and their implications for trait durability are discussed.
Species 1: Coleoptera Chrysomelidae Diabrotica
Keywords: Cry34Ab1, Cry35Ab1
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