Abstract
Abstract Plots were established at the Rosemount Agricultural Experiment Station, Dakota Co., MN, on Waukegan silt loam. Treatments were applied Jul 20 to plots 54 x 54 ft (0.05 acre) in a randomized block design with 4 replications using a tractor-drawn boom sprayer delivering 27 gal/acre at 100 psi pressure. Insect populations were sampled 1 and 7 days after spraying by taking 100 pendulum sweeps/plot with a 15 inch dia sweep net. All treatments except Thuricide controlled potato leafhopper and all treatments appeared effective against green cloverworm larvae. No phytotoxicity was noted.
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