| Abstract/Contents: | "The study was conducted in Wayne, PA. The fairway consisted primarily of annual bluegrass (50%) 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 3 gal/1000 ft². At the 1st treatment time (4 Jun), the following soil and environmental conditions existed: air temperature, 74°F; soil temperature at 1-inch depth, 70°F; soil temperature at 2-inch depth, 68°F; RH, 63%; amount of thatch, 0.125 inch; soil type, silt loam; soil particle size analysis: 31.1% sand, 55.9% silt, 13.0% clay; soil moisture (oven baked), 24.5%; organic matter, 10.1%; water pH, 7.0; soil pH, 5.3; time of treatment early afternoon; and overcast skies. The experimental area was irrigated with 0.25 inch of water 4 hr after treatment. At the 2nd treatment time (15 Jul), the following soil and environmental conditions existed: air temperature 81°F; soil temperature at 1-inch depth, 79°F; soil temperature at 2-inch depth, 78°F; RH, 90%; amount of thatch, 0.125 inch; soil type, silt loam; soil particle size analysis: 31.1% sand, 55.9% silt, 13.0% lay; soil moisture (oven baked), 30%; organic matter, 6.2%; water pH, 7.0; soil pH, 5.3; time of treatment, early afternoon; and cloudy skies. The experimental area was irrigated with 0.25 inch of water immediately after product dried. At the 3rd treatment time (12 Aug), the following soil and environmental conditions existed: air temperature, 69°F; soil temperature at 1-inch depth, 74°F; soil temperature at 2-inch depth, 73°F; RH, 85%; amount of thatch, 0.125 inch; soil type, siltloam; soil particle size analysis: 31.1% sand, 55.9% silt, 13.0% clay; soil moisture (oven baked), 23.6%; organic mmatter, 6.0%; water pH, 7.0; soil pH, 5.2; time of treatment, early afternoon; and cloudy skies. The experimental area was irrigated with 0.25 inch of water immediately after product dried. Post-treatments counts were made on 10 Sep. The total number of green June beetle larvae flushed to the surface following an application of Sevin 7.15 G over a 24-hr observation interval was recorded from each replicate. No treatments provided significant control. Green June beetle grub populations were very clumped. No phytotoxicity was noted." |
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