Black Cutworm Control on Golf Course Greens with Bacillus Thuringiensis and Fenoxycarb, 1993

Abstract

Abstract Treatments were duplicated on greens at two golf courses. Plots were arranged in a RCB design, replicated 4 times. Plot size was 8 × 8 ft. Liquids were applied in 2 liters of water with a sprinkler can. Trial 1 (Buckhannon C.C.) was initiated 20 Aug. Plots were not pre-irrigated because the green was wet from overnight rain and treatments were applied during a light rain; about 0.02 inches of rain occurred shortly after all treatments were applied and there was no posttreatment irrigation. Environmental conditions were: air temperature, 23°C; RH, 97%; overcast with light rain; soil temperatures, 23°C (1 inch), 25°C (surface). Treatments were evaluated at 6 DAT by treating the entire green with cyftuthrin (Tempo) at 0.04 lb (AI)/acre and counting the no. of larvae flushed to the surface after about 1 h. Larvae were mostly small to medium in size ranging from 5 to 36 mm in length with 92% being less than 20 mm long. Trial 2 (Clarksburg C.C.) was initiated 23 Aug. Plots were pre-irrigated with 2 liters of water per plot, treatments were applied, then irrigated with 2 liters about 40 minutes posttreatment. Environmental conditions were: air temperature, 26.5°C; RH, 57%; clear and calm; soil temperature, 23.5°C (1 inch), 28°C (surface). Treatments were evaluated at 7 DAT using the same method as in Trail 1. Larvae were mostly small to medium in size ranging from 5 to 43 mm in length with 72% being less than 20 mm long.