Abstract
Abstract The experiment was conducted on a buffalograss lawn in Lincoln, NE. Insecticides were applied on 14 Jun to 4 × 4 ft plots arranged in a completely randomized design with 4 replications. Buffalograss was maintained at a mowing height of 4.0 inches and mowed at 2.0 inches prior to insecticide applications. Thatch accumulation ranged from 0 to 0.25 inch. Conditions at the time of application were as follows: air temperature, 78°F; soil temperature (4-inch depth), 75°F; soil type, silty clay loam; soil organic matter, 3-5%; soil pH, 6.0-7.0; water pH, 7.0; soil moisture, 20%. Liquid insecticides were applied with a COa sprayer using an LF-4 nozzle at 24 psi and delivering 5 gal spray/1000 ft2. Granular formulations (G) were applied with a precalibrated Gandy 24H12 spreader. Immediately following application, plots were irrigated with 0.125 inch water. No rainfall occurred during the post-treatment period. Product efficacy was evaluated 5 DAT by removing from each plot three turf-soil cores to a depth of 2 inches with a 4.25-inch diam cup cutter (0.3 ft2 total area per plot). Cores were returned to the laboratory and placed in Berlese funnels. Extracted chinch bugs were counted after 48 h.
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