Hairy Chinch Bug Control on a Home Lawn in Butler, 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 ft2 spray rate. At treatment time, the following soil and environmental conditions existed: air temp, 78°F; soil temp, 77°F; % RH, 72; amount of thatch, 0.5 inches; soil type, silt-loam; % soil moisture, 14.3; soil pH, 6.0; % organic matter, 3.5; water pH, silightly acidic; no rainfall was recorded over the posttreatment period. Posttreatment counts were made 6 days after the initial 30 Jul treatment date. Hairy chinch bugs were sampled by driving a 6 inch stainless steel cylinder into the turf, filling with water, and counting the number 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.