Hairy Chinch Bug Control on a Home Lawn in State College, Pa, 1986

The lawn consisted primarily of fine leafed fescue. Treatment plots were 5 x 6 ft, arranged in a RCB design and replicated 3 times. Liquid formulations were applied by using a C02 sprayer with four 8004VS Tee Jet nozzles mounted on a 6-ft boom, operating at 28 psi with a 4 gal/1,000 ftaspray rate. At treatment time, the following soil and environmental conditions existed: air temp, 75°F; soil temp, 75°F; % RH, 67; amount of thatch, 0.5-1 inch; soil type, silt-clay-loam; % soil moisture, 15.7; soil pH, 6.4; % organic matter, 2.8; water pH, slightly acidic. Posttreatment counts were made 12 days after the initial 13 Aug treatment date. Hairy chinch bugs were sampled by driving a 6 inch stainless steel cylinder into the turf, filling with water, and counting the nmber of chinch bug nymphs and adults floating to the surface over a 10 min period. Three floatation samples were randomly taken from within each replicate, and the total number of chinch bugs from each sample was recorded and converted to a ft2 count.