Abstract
Two separate trials were conducted. Corn for the first trial was planted on 28 May and for the second trial on 12 Jun, both at the Vegetable Crops Research Farm near Geneva, NY. The plants were arranged in a RCB design with four replicates of nine treatments and one check. Plots consisted of seven 25-ft rows of sweet corn on 30-inch centers with 9-inch plant spacing. Blocks were separated by 25 ft. Treatments involved three applications of each insecticide for controlling naturally intesting Lepidoptera. Foliar sprays were applied with a 5-row CO2-pressurized high-boy tractor-mounted boom, having 3 nozzles per row (one over the top and one drop nozzle on each side) with flat fan 110015 tips, and delivering 30 gpa at 47 psi and 2.5 mph. Silwet L-77 spray adjuvant was applied at 0.1% v/v with all treatments. In the first trial, insecticides were applied on 8, 15, and 23 Aug. Treatments for the second trial were applied on 15, 23 Aug, and 2 Sep. Trials were evalu-ated on 2 and 8 Sep for the respective plots by selecting 25 ears from the five treated rows of each plot and evaluating them for ear injury.
INSECT CONTROL ON LATE-SEASON SWEET CORN WITH FOLIAR SPRAYS OF CONVENTIONAL AND REDUCED-RISK INSECTICIDES, 1998