Performance of Insecticides for Grape Berry Moth, (GBM) 1985

An established vineyard of Concord grapes comprising 12 acres was used for insecticide evaluation. Rows were 9 ft apart and vines 8 ft apart within the row. Each treatment was replicated 4 x in a completely randomized block design. Each replication consisted of ca 45 vines (3 rows x 15 vines per row). Insecticide applications were made as foliar sprays on 15 Jun, 26 Jun, and 20 Aug, with the exception of Danitol which was applied 4 times—14 Jun, 26 Jun, 7 Aug, and 21 Aug. All plots were treated with triademefon (Bayleton) at 1 oz AI/A to control powdery mildew. Commercial application conditions were used. Materials were applied with a hooded boom over the row sprayer operated at 500 psi, equipped with 7 nozzles per boom on each side with No. 2% (mm) discs and 3-hole whirl plates. Spray volumes are noted on the table. Counts made on 12 Sep 1985 were based on number of berries injured by GBM larvae in 100 clusters from each replication. Ten clusters were sampled from throughout the canopy of 10 vines per plot. Carbaryl 50WP, 2 lb AI/A, and parathion 15WP, 1.5 lb AI/A, were standards.