Grape Berry Moth Insecticide Evaluation, 1987

Insecticides were applied to 40-yr-old ‘Concord’ grapes in a semiabandoned vineyard. Rows were 9 ft apart and vines were 6 ft apart within the row. Each treatment was replicated 4 times in a completely randomized block with each block consisting of 10 vines in a row with at least 1 buffer row between each replicate. Treatments were applied with a 32 TMG Meyer airblast sprayer traveling 4.83 km/hr and delivering 50 gal/acre. Applications were timed according to pheromone trap catch for both generations. The dates of insecticide application were 2, 14, and 25 Jun; 7 and 21 Jul; 3, 17, and 28 Aug; and 9 Sept. The fungicide program consisted of Bayleton 50WP at 86 g/acre which was included in the last 6 insecticide application dates listed above, starting with 7 Jul. The treatments were evaluated by examining 25 randomly picked clusters from each replicate for a total of 100 clusters/treatment.