Abstract

Abstract Plots were located in a commercial hop yard near Greenleaf, Idaho. Each plot consisted of eight hills. Treatments were arranged in a randomized block with four replicates. Aphid treatments were applied 11 July with a truck mounted sprayer with hose and handgun that applied 75 gal/acre at 100 lb/in2 . Miticide treatments were applied 30 Aug. with a Solo Air Blast Mist Blower at 50 gal/acre. Mite numbers were estimated by taking 10 leaves from the top of plants in each plot. Leaves were processed through a brushing machine and mites were counted under a compound microscope. Aphids were counted on 25 leaves from each plot.

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