European Corn Borer First Brood Control, 1983

Six insecticidal treatments were examined to determine efficacy on first brood European corn borer in field corn. Materials were applied as foliar sprays on 27 May using a CO2-powered backpack sprayer at 32 lb/in2 delivering 33.7 gal/acre. Plots were six rows, 25 feet long with the midddle four rows sprayed. A randomized complete block experimental design was used with four replicates in ‘Pioneer 3780’ corn grown on the Sabine Hall farm in Richmond county, Va. Individual plots were evaluated periodically by examining all plants in 25 ft of row for the presence of borer larvae. After tasseling was complete, plant heights were obtained by measuring three plants in each plot. At harvest, plant stalks were observed for the incidence of larval tunnelling.