Abstract
Abstract White grub control trials were conducted in a city park located in the eastern part of El Paso, Texas. Temperature, rainfall, and irrigation were normal during the period of the test. Thatch depth in the common bermudagrass averaged ca. 0.64 cm. The soil was a calcareous Bluepoint sandy loam. Six replications of 15 treatments were established. The 2 by 2 m plots were randomly assigned to replications by larval population prior to treatment. Two adjacent sod samples 30.5 cm2 and 7.6 cm deep were taken from each plot at each sample period. All specimens were counted and recorded at the site. After irrigation, liquid insecticides were sprinkled in water (buffered to pH 7), and granules were applied from shakers. A garden hose was dragged across the plot area for initial incorporation, and 1.3 cm of water was applied with the sprinkler system. Treatments were applied Jul 27 and counts were made 14, 24, and 53 days posttreatment.
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