Abstract
Abstract Sweet corn was planted 2 Jun at the University of Minnesota, Agricultural Experiment Station, Rosemount MN. Treatments were 1 row, 50 ft long, replicated 3 times, in a randomized block design. Plants were spaced at 7-8 inch intervals within rows 30 inches apart. Twenty-five first instar European corn borer larvae were placed in the silks of all ears 5 Aug. Experimental treatments were separated by 1 row of corn, untreated and not artificially infested with ECB. Insecticidal treatments were applied 2 times, 4 and 12 Aug. Foliar sprays were applied using a C02 powered hand sprayer delivering 36 gal of water/acre at 35 psi. Granular treatments were hand applied using a “shaker” in a 12 inch band over the silks. Evaluations were made 20 Aug by scoring 35 randomly selected ears per plot for presence of ECB damage to the ear.
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