Abstract
Abstract Seven treatments were evaluated for their repellancy to the Japanese beetle at Wooster, OH. Plots consisted of 2 adjacent grape vines, having 4 replications per treatment in randomized blocks. Vine spacing was 9 ft between rows and 8 ft within the row. Granular formulations (Temik and Furdan) were applied only once on June 3. Granules were incorporated into the soil 1.5 ft away from each side of the row. Granules were distributed uniformly in the bottom of a 2-inch furrow and covered with soil within 5 minutes. Soil moisture was good at time of application and granules were not watered-in. The rest of the treatments were applied June 24 and Jul 12 as foliar sprays using a hand-operated C02 sprayer operated at 50 psi and equipped with a TeeJet 3D disc and No. 13 core. Sprays were applied to vines at the rate of 60 gal/acre. Visual observations were made on the 8 ft of canopy between the trunks of vines from the east side of the row. Ratings were as follows: no live beetles = 0; 1-10 live beetles = 1; and 11 or more live beetles = 2. No phytotoxicity was observed. Reports of repellancy by synthetic pyrethroids were confirmed with Cymbush and Advantage yielding lower counts at 2 days after treatment. Cymbush retained its repellancy for a full 9 days.
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