| Abstract/Contents: | "The fairway located in Lancaster County, PA, consisted primarily of perennial ryegrass (80%) and creeping bentgrass (50%). Treatment plots were 7 x 6 ft, arranged in a RCB design and replicated 3 times. Liquid formulations were applied by using a CO₂ sprayer with 4 8004VS TeeJet nozzles mounted on a 6-ft boom, operating at 28 psi, and delivering 4 gal/1000 ft². At the 1st treatment time (4 Jun), the following soil and environmental conditions eisted: air temperature, 68°F; soil temperature at 1-inch depth, 64°F; soil temperature at 2-inch depth, 62°F; RH, 67%; amount of thatch, 0.125 inch; soil type, silt loam; soil particle size analysis: 30.7% sand, 61.9% silt, 7.4% clay; soil moisture (oven baked), 28.3%; organic matter, 5.6%; water pH, 7.0; soi pH, 6.1; time of treatment, mid-morning; and overcast skies. The experimental area was irrigated with 0.25 inch of water 3 hr after treatment. At the 2nd treatment time (15 Jul), the following soil and environmental conditions existed: air temperature, 78°F; soil temperature at 1-inch depth, 74°F; soil temperature at 2-inch depth, 75°F; RH, 75%; amount of thatch, 0.0625-0.125 inch; soil type; silt loam; soil particle size analysis: 30.7% sand, 61.9% silt, 7.4% clay; soil moisture (oven baked), 37.7%; organic matter, 7.2%; water pH, 7.0; soil pH, 5.9; time of treatment, mid-morning; and cloudy skies. The experimental area was irrigated with 0.25 inch of water immediately after product dried. A [At] the 3rd treatment time (12 Aug), the following soil and environmental conditions existed: air temperature, 65°F; soil temperature at 1-inch depth, 69°F; soil temperature at 2-inch depth, 69°F; RH, 90%; amount of thatch, 0.0625-0.125 inch; soil type, silt loam; soil particle size analysis: 30.7% sand, 61.9% silt, 7.4% clay; soil moisture (oven baked), 40.0%; organic matter, 5.7%; water pH, 7.0; soil pH, 6.5; time of treatment, early morning; and cloudy skies. The experimental area was irrigated with 0.25 inch of water immediately after product dried. Post-treatment counts were made on 29 Aug. The total number of green of June beetle larvae flushed to the surface following an application of Sevin SL over a 24-hr observation interval was recorded from each replicate. No treatment provided significant control. Green June beetle grub populations failed to develop. No phytotoxicity was noted." |
|---|
