Abstract
Abstract Six insecticides were applied to a rough in Eisenhower Park, LI, NY on Aug 19 for control of a mixed population Oriental/Japanese/Asiatic Garden beetle grubs. The rough consisted of annual bluegrass (20%), Kentucky bluegrass (30%), bentgrass (10%), and broadleaf weeds (40%). The experimental design was a RGB with 4 replications. Individual plots were 10 ft × 10 ft. Thatch accumulation was ca. 0.25 inch compressed between the fingers. Granular materials were applied with a precalibrated Gandy 2.5 spreader. Liquid materials were premeasured in the laboratory and applied with 3 gal of water through a watering an All liquid applications were made in 2 directions within each plot. At treatment time, the following environmental and soil conditions existed: air temperature, 80°F; soil temperature (1 inch), 75°F; soil type, gravelly loam; soil pH, 7.1; water pH 9.2; and soil moisture, 18.9%. Posttreatment couts were taken 35 days later (Sept 24) by cutting a 1 × 10-ft strip lengthwise through each plot with a mechanical sod cutter (2.25 inch) and examining the sod and underlying soil for grubs. Species identifications were determined in the laboratory.
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