Abstract
Abstract The fairway consisted primarily of annual bluegrass (20%), Kentucky bluegrass (40%), and perennial ryegrass (40%). Treatment plots were 9 × 6 ft, arranged in a randomized complete block design and replicated 3 times. Granular formulations were applied with a hand-held shaker and mixed with a fine grade top-dressing sand to facilitate product distribution. At treatment time (11 Sep) the following soil and environmental conditions existed: air temperature, 70°F.; soil temperature at 1 inch depth, 70°F.; RH, 90%; amount of thatch, 0.125 inches; soil type, silt loam; soil particle size analysis: 23.6% sand, 64.8% silt, 11.6% sand; soil moisture, 28.3%; organic matter, 2.9%; water pH, 7.0; soil pH, 5.4; 4.3 inches of rainfall was recorded over the posttreatment period. Immediately after treatment the experimental area was irrigated with 0.5 inches of water. Posttreatment counts were made 23 d later (4 Oct). Three ft2 sod samples were randomly taken from each replicate, and the total number of Northern masked chafer and Japanese beetle grubs/ft2 was recorded.
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