On-farm Corn Rootworm Trials

Methods Eight CRW trials were conducted in Lyon, Sioux, Clay, Monona, Crawford, and Hancock counties in 2013 (Table 1). Some trials compared a CRW-Bt hybrid with and without an insecticide, and others also included a non-Bt hybrid with and without an insecticide (Table 2). In Trials 1, 3, and 7, Pioneer Herculex® hybrids were used. A non-Bt Pioneer hybrid (987HR) was included in Trial 7. In Trial 2, hybrids utilizing the Agrisure® genetics were used and compared with a non-Bt hybrid (NK 53W). In Trial 4, two VT3 hybrids were used containing a refuge hybrid in the bag (PRIB). In Trials 5, 6, and 8, SmartStax® genetics were used. The hybrid in Trial 8 contained a refuge hybrid in the bag (RIB). All trials were conducted in fields that were planted to corn in 2012.