Abstract
Abstract Four insecticides were evaluated for their ability to control the aster leafhopper. The plots were evaluated for 2 wk posttreatment to determine the residual activity of the insecticides. The trial was conducted at the University of Minnesota Agricultural Experiment Station, Rosemount, MN. Each plot had six 20-ft rows (24-inch centers) and treatments were arranged in a randomized complete block with 3 replicates. Individual plots were separated from others by 10 ft of bare ground on all sides to minimize interplot movement of adult leafhoppers. A single application on 31 Aug was applied using a CO2 powered backpack sprayer at 40 psi (57.5 gal/acre). Samples were taken with a 15-inch diam sweep net taking 25 sweeps per plot.
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