Control of European Corn Borer in Whorl Stage Corn, 1995

The experimental design was RCB with 22 insecticide-treatments and an untreated check replicated 4 times. Single row plots were 50 ft in length and at 30 inch spacings. Corn was no-till planted into soybean residue on 16 May. Granular insecticides were Applied in a 7-inch band with cone belt distributors mounted on a Hahn Hi-Boy. Liquid insecticides were applied with a back-pack sprayer in 20 gpa at 30 psi on 12 Jul. Five d prior to insecticide application 6 black headed ECB egg masses were placed on 10 marked plants/replicate for later evaluation. On 3 Aug, the marked plants in each replicate were dissected from tassel to ground, examined and the number of corn borer cavities recorded.