Abstract
Abstract Potatoes were planted 15 May at the Northern Colorado Research Center, Greeley, CO. Plot size was 3 rows (30-inch spacing, 25-ft length), arranged in a randomized complete block design with 3 replications. Treatments were applied 1 Aug using a CO2 compressed air sprayer delivering 122 gal/acre. Soaps were diluted 40:1. Evaluations were made 3 Aug. Potato psyllid and green peach aphids were counted from 20 leaves selected from the center row of each plot. All Colorado potato beetle larvae on the center row of each plot were counted.
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