Control Foliar form Grape Phylloxera in Ohio, 1975

Eight insecticides were evaluated for control of grape phylloxera at Wooster, Ohio. Plots consisted of 3 Clinton vines with eight feet spacing in rows and nine feet separating rows, with 4 replications in randomized blocks. Insecticides were sprayed on the foliage at the rate of 2 gal per treatment (90 gal per acre) using a Hudson 6209, 2 gal. Favorite sprayer at 40 psi with the exception of Temik which was applied to soil in granular form. Temik granules were applied 1.5 feet on each side of the vineyard row. The granules were distributed uniformly in the bottom of a 1.5 inch furrow along the sides of each replicate and covered with soil as soon as applied. Soil was moist at time of application. All insecticides were applied on June 18, 1975 when grapes were the size of BB’s. A second application was made with all compounds except PP 557 and Temik on June 30, 1975 when berries were ca. 9 mm in diameter. In sampling, 10 shoots were chosen at random from the center of each plot, half from each side of the row. The number of galls was recorded on the 10 apical leaves of each of these shoots. Two fungicide applications were made to entire experimental area: (1) May 22, 1975; 8 oz of Captan 50W plus 4 oz Benlate 50WP per 50 gal water: and (2) June 23, 1975; 1.5 lb Captan 50W plus 8 oz Benlate 50WP per 50 gal water.