Control of Corn Rootworm Larvae with Soil-Applied Insecticides and Bt Hybrids, 2014

We established one trial at the Northwestern Illinois Agricultural Research and Development Center near Monmouth, IL, to evaluate the efficacy of soil-applied insecticides and Bt hybrids to control corn rootworm (CRW) larvae. The experimental design was a RCB with four replications. The plot size for each treatment was 10 ft (four rows) × 40 ft. The previous crop was a trap-crop (late-planted corn and pumpkins). Corn was planted on 7 May using a four-row, vacuum-style planter (SRES, South Hutchinson, KS) at a rate of 36,600 seeds/acre in 30-inch rows at an approximate depth of 1.75 inches. Hybrid information is provided in Table 1. Granular insecticides were applied through modified Noble metering units or through modified SmartBox metering …