Abstract
Abstract The turfgrass area consisted primarily of fine fescue (80%) and weeds (20%) in Lewistown, PA. Treatment plots were 8 X 6 ft, arranged in a RCB design and replicated 3 times. Liquid formulations were applied with a CO2 compressed air sprayer with 4 8004VS TeeJet nozzles mounted on a 6 ft boom, operating at 28 psi, and applied in 726 ml of water/48 ft2 or delivering 4 gal/1000 ft2. Cruiser was applied with a CO2 compressed air sprayer with 4 S.S. CO 7F-VS-5 flood jet nozzles mounted on a 6 ft boom, operating at 28 psi, and applied in 726 ml of water/48 ft2 or delivering 4 gal/1000 ft2. At treatment time (4 Sep) the following soil and environmental conditions existed; air temperature, 81°F; soil temperature at 1 inch depth, 78°F; soil temperature at 2 inch, 72°F; RH, 79.0%; amount of thatch, 0.0625 inch; soil textural class, silt loam; soil particle size analysis: % sand, 14.6; % silt, 59.5; % clay, 25.9; organic matter, 3.3%; 28.8% soil moisture (oven dry weight); water pH, 7.0; soil pH, 6.0; application time, late-morning; and overcast skies. Rainfall occurred immediately after treatment. Three ft2 sod samples were randomly taken from each replicate, and the total number of scarab white grubs/ft2 was recorded on October 7.
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