Abstract
Abstract Sweet corn was planted 15 Jun at the University of Minnesota Agricultural Experiment Station, Rosemount MN. Treatments were 1 row, 50 ft long, replicated 5 times in a randomized complete block design. Plants were spaced at 7 to 8-inch intervals within rows, 30 inches apart. Twenty-five first ins tar ECB were placed on the silks of all ears in all treatments on 13 Aug. Experimental treatments were separated by 1 row of corn, untreated and not artificially infested with ECB. Insecticidal sprays were applied 3 times, 12, 21, and 27 Aug, to the silk area of the ears. Foliar treatments were applied using a CO2 powered hand-sprayer delivering 36 gal of water/acre at 35 psi. Granular treatments were hand applied by “shaker” in a 12-inch band over the silks. Evaluations were made 16 Sep by scoring 25 randomly selected ears per plot for presence of live ECB larvae or ECB damage to the ear.
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