Control of the Corn Lepidoptera by Liquid Insecticides, 1990

Corn was planted on 21 Jun at the Vegetable Crops Research Farm near Geneva, N.Y. The planting consisted of a RCB design with four replicates of seven treatments and one control. Plots consisted of six 30-ft rows of sweet corn on 3-ft centers with 9-inch plant spacing. Blocks were separated by 20 ft. Treatments consisted of three applications of each insecticide for naturally occurring Lepidoptera. Foliar sprays were applied by a John Blue Highboy delivering 51 gal/acre at 50 psi and 2 mph, with five nozzles per row (two on each side, one from the top) using flat fan nozzles with 110015 tips. Insecticides were applied on 8, 15 and 23 Aug. On 12 Sep, 25 ears from the four middle rows of each plot were evaluated for ear injury.