Bacillus thuringiensis strain PS149B1 produces binary insecticidal crystal proteins (ICP’s) named Cry34Ab1/Cry35Ab1 which is under commercial development through a collaborative research effort between Pioneer Hi-Bred and Dow AgroSciences LLC.  Maize hybrids expressing Cry34Ab1/Cry35Ab1 ICP’s are being developed for control of the larval stage of corn rootworm.  Non-target organism evaluations are an important component of the product development process.  Field studies were initiated to evaluate the impact of Cry34Ab1/Cry35Ab1 corn hybrids on non-target arthropods.  Results of the 2001 and 2002 study are presented as well as an update of the 2003 study.  Future plans for field monitoring are discussed.
Keywords:   Non-target organism, Field monitoring
        
        
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