Abstract
Abstract This test was conducted in an established Concord grape vineyard in North East, Pa. Plots consisted of three vines in a row replicated four times in a randomized block design. Vine spacing was 9 ft between rows and 8 ft within rows. Sprays were applied on 12 Aug. using a 6-gal True-Test plant sprayer operated off a high pressure hose of a Myers 61256ET2 hydraulic vineyard sprayer. Operating pressure was 100 lb/in2. Sprays were applied to runoff resulting in approximately 200 gal of spray per acre. Triton AG-98 was the spreader sticker used at a rate of 2 oz per 100 gal in all treatments. The treatments were evaluated by counting the number of leafhopper nymphs on each of 10 injured leaves selected at random per plot.
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