Black Cutworm and Sod Webworm Larval Control on Golf Course Turfgrass Nursery, Medina County, Oh, 1994

The study was located on the Westfield Country Club bentgrass nursery. Insecticides and nematodes were applied 11 Jul to plots 4 × 8 ft (1.2 × 2.4 m) arranged in a RCB with the blocks separated by 3 ft (0.91 m) and replicated 4 times. Treatments were applied using a CO2 sprayer with TeeJet® XR8006VS nozzles at 30 psi (2.11 kg/cm2) pressure that delivered a volume of 1.0 gal/1000 ft2 (407 liter/ha). Treatments were not irrigated after application. Environmental conditions at time of treatment were as follows. Turf: level, dense, 7/,6 inch (11 mm) height, heavy dew present. Thatch: loose, moist, V* to 3/s inch (6-9 mm) or less. Soil: moist, 76°F (24.4°C) at 1.0 inch (2.5 cm), 75°F (23.9°C) at 3.0 inch (7.6 cm), sandy loam. Weather: mostly sunny, 76 to 82°F (24.4-27.8°C), 0 to 7 mph (0-11.7 km/h) wind. Efficacy data taken 15 Jul (4 DAT) and 25 Jul (14 DAT) were based on the number of BCW and SWW larvae flushed to the surface in a 1.0 yd2 (0.84 m2) area using a soap irritant drench of 15 ml Joy®1 dishwashing detergent in 2.0 gal (7.6 liter) water.