Abstract
Abstract Field corn was planted 23 Aug on USDA facilities, Tifton, GA. Plots were 6 rows wide (36-inch spacing) and 40 ft long with 3 ft alleys separating plots on the same row. Plots were arranged in a randomized complete block design with 4 replications. Plants were in the whorl stage at the time of applications. Chemigation treatments were applied with a chemigation simulator calibrated to deliver 2172 gal of water/acre through 4 E53 whirljet nozzles at 10 psi. Desired insecticide concentrations were mixed in either vegetable oil or water at a rate of 2.1 qt of material/acre. Thirty plants/plot were randomly selected from the 2 center rows, and the number of freshly damaged plants and larval species composition noted. Counts were performed prior to initiation of the test and 48 h after each treatment.
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