Evaluation of Merit Formulations to Control Green June Beetle Grubs on a Golf Course Fairway in Wayne, Pa, 1994

Abstract

Abstract The fairway consisted primarily of annual bluegrass (50%) and creeping bentgrass (50%). Treatment plots were 9 × 6 ft, arranged in a RCBD, replicated 3 times. Liquid formulations were applied by using a CO2 compressed air sprayer with 4 8004VS TeeJet nozzles mounted on a 6 ft boom, operating at 28 psi, and delivering 5 gal/1000 ft2. Granular formulations were applied with a hand held shaker and mixed with topdressing sand to facilitate product distribution. At treatment time (25 May), the following soil and environmental conditions existed: air temperature, 80°F; soil temperature at 1 inch depth, 80°F; soil temperature at 2 inch depth, 76°F; RH, 78%; amount of thatch, 0.125 inches; soil type, silt loam; soil particle size analysis: 24.5% sand, 60.6% silt, 14.9% clay; soil moisture (oven baked), 31.8%; organic matter, 8.0%; water pH, 6-7; soil pH, 4.8; and cloudy skies. Immediately after treatment the experimental area was irrigated with 0.25 inches of water. Counts were made 118 DAT (20 Sep). The total number of new freshly constructed green June beetle burrows were recorded from each replicate (54 ft2).