Abstract
Abstract The experiment was conducted on a buffalograss lawn in Lincoln, NE. Insecticides were applied on 6 Sep to 5 × 5 ft plots arranged in a randomized complete block design and replicated 4 times. The predominant grass species was buffalograss (98%) which was maintained at a mowing height of 5.0 inches. Conditions at the time of application were as follows: air temperature, 78°F; soil temperature (4-inch depth), 72°F; soil type, silty clay loam; soil moisture was well below field capacity. Insecticides were applied with a CO2 sprayer using a LF-4 nozzle at 24 psi and delivering 4 or 10 gal finished spray/1000 ft2. A total of 4.79 inches of rainfall occurred during the post-treatment period. No irrigated water was applied. Product efficacy was evaluated 5 DAT (11 Sep) by cutting from each plot 4 randomly selected sections of turf to a depth of 2 inches with a 4- inch diameter cup cutter (0.35 ft2 total area per plot). Turf sections were returned to the laboratory and placed in Berlese funnels. Extracted chinch bugs were counted after 48 hr.
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