Efficacy of Several Insecticides Against Annual Bluegrass Weevils, Golf Course Fairway, 1992:

Treatments were applied on 5 May to 2.0 X 2.0m plots, which were replicated 5 times and arranged in a RCB design. The plots were established on a golf course fairway in Rye, NY–annual bluegrass (65%), creeping bentgrass (35%), maintained at 1.3 cm. Granular materials were applied by hand using glass jars with perforated lids. Liquid materials were applied with watering cans, using 3 liters water per plot. The Turcam and Oftanol plots were watered in by hand (ca 0.5 cm) (pH 6.2) before the Orthene plots were treated. Soil temperature was 12°C (5 cm depth) at time of application. Product efficacy was evaluated on 2 Jun by removing 5 soil cores (10.6 cm diam) per plot and inspecting the cores under magnification in the Amherst laboratory (each plug was ca. 0.01 m2). At the time of sampling, the population was 21% 3rd instar, 27% 4th instar, 52% 5th instar.