Abstract
Abstract The study was conducted in Lincoln, NE on a Kentucky bluegrass and perennial rye golf course fairway. The turf (50% Kentucky bluegrass and 50% perennial rye) was maintained at a mowing height of % inches and thatch accumulation in the plot area was 0.75 inches (finger compressed, 0.5 inches). Field conditions at the time of application were: soil type, silty clay loam; soil organic matter, 3—5%; soil pH, 6—7; water pH, 7.0; soil moisture, near field capacity. Plots were 6 × 6 ft and the experimental design was a RCB with 4 replications. Insecticide treatments were applied 24 Aug using a CO2 sprayer with an LF-4 tip at 24 psi and delivering 5 gal finished spray/1000 ft2. Immediately following applications, the test area was irrigated with approximately 0.5 inches of water. A total of 4.61 inches of rain fell during the post-treatment period. Product efficacy was evaluated 14 Sep (21 DAT) by removing from each plot three 8-inch diam turf-soil cores (1.05 ft2 total area) to a depth of 3 inches and counting the number of surviving grubs.
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