G12

Acelepryn, Provaunt, Conserve, and Talstar were tested alone or in sequential applications for field efficacy against ABW on a golf course fairway turf in spring 2010. The test was conducted at Tumble Brook Country Club, Bloomfield CT. Each product was applied 12 Apr or 23 April or 10 May. All treatments were applied with a watering can (2 qt water per plot), with half the material applied in one direction and the remainder applied in a perpendicular direction. Plots were irrigated with 0.05 inches water within 1 h after application. The conditions at the time of application were as follows: (12 April): air temp, 63o F; soil temp (at 2 inches), 60o F; water pH, 5.6; sunny, light NW breeze (5 mph); (23 April): air temp, 62° F; soil temp (at 2 inches), 67° F; (10 May): air temp, 60°; soil temp 59°; water pH, 5.2; cool, clear, light NW wind; thatch ca. 0.5 – 1.0 inch thick. Treatment plots were 5 ft by 6 ft, replicated 4 times, and arranged in a CRB design. All plots were sampled 24 May to determine the efficacy of the compounds against larvae of the first generation ABW. Product efficacy was evaluated by removing eight 1.85-inch diameter cores from near the center of each plot, transporting the cores to our laboratory in Amherst, MA, and using a saline solution to extract all stages except eggs. Each core was recorded separately, and all counts were included in statistical analyses (Fisher Protected LSD; 0.05 significance level; F = 8.18; P < 0.0001). “Larvae” per core actually reflects counts of all larvae and pupae. Adults were not included in the analysis because of their mobility.