Summer Control of Hairy Chinch bug at Site Two on Established Fescue Turfgrass in Somerset, PA, 1989

The turfgrass area consisted of fine leafed fescue. Treatment plots were 5 × 6 ft arranged in a randomized complete block design and replicated 3 times. Liquid and W formulations were applied by using a CO2 sprayer with 4 8004VS Tee Jet nozzles mounted on a 6 ft boom, operating at 28 psi, and delivering 4 gal/ 1000 ft2. Granular formulations were applied with a hand-held shaker and mixed with a fine grade top-dressing sand to facilitate product distribution. At treatment time the following soil and environmental conditions existed: air temperature, 80°F; soil temperature at 1 in depth, 70°F; RH, 50%; amount of thatch, 0.75-1.5 inches; soil type, loam, soil particle size analysis: 45.6% sand, 34.8% silt, 19.6% clay; soil moisture, 10.8%; organic matter, 1.9%; water pH, 6.0; soil pH, 5.5; no rainfall was recorded over the posttreatment period. Posttreatment counts were made 9 Aug, 7 d after the initial treatment (2 Aug). Hairy chinch bugs were sampled by driving a 6 inch-diam stainless steel cylinder into the turf, filling it with water, and counting the number of chinch bug nymphs and adults floating to the surface during a 10 min period. Three floatation samples were taken randomly from each replicate, and the total number of chinch bugs from each sample was recorded and coverted to a ft2 count.