Abstract
Abstract Experimental plots measuring 1 row (76 cm row spacing) × 7.6 m were established in a commercial corn field (planted 6 Jun) on the St. Paul campus of the University of Minnesota. The center 15 plants of each plot were infested with 2 “black-headed” ECB egg masses on 19 Jul. Treatments were arranged in a randomized complete block design with 4 replications. Insecticides were applied on 25 Jul to corn in late whorl stage (V16). Granules were banded over the row with a Gandy granular applicator; liquids were applied in a band over the row using a C02 powered backpack sprayer delivering 217 liter/ha (20 gal/acre) through an 8004 nozzle. Insecticide performance was evaluated on 27-29 Aug by dissecting the stalks of all 15 infested plants per plot, and counting tunnels and ECB larvae.
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