Summer Management of Hairy Chinch Bug with Formulations of Imidacloprid and Carbaryl on Es-Tablished Fescue Turfgrass in Somerset, Pennsylvania, 1995

The turfgrass area consisted primarily of fine leafed fescue. Treatment plots were 5 X 6 ft arranged in a RCB design, replicated 3 times. Granular formulations were applied with a hand held shaker and mixed with fine top dressing sand to facilitate product distribution. At treatment time (25 Jul) the following soil and environmental conditions existed: air temperature, 81° F; soil temperature at 1 inch depth, 88° F; soil temperature at 2 inch depth, 79° F; RH, 61.0%; amount of thatch, 0.5-1.0 inches; soil textural class, silt loam; soil particle size analysis: 28.8% sand, 50.4% silt, 20.9% clay; soil moisture (oven dry weight), 23.5%; organic matter, 7.9%; water pH, 7.0; soil pH, 5.8; application time, early evening; and sunny skies. Immediately after treatment the area was irrigated with 0.125 inch of water. 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 (sampling dates, Aug 17 and Aug 30). Three flotation samples were taken randomly from each replicate. The total number of chinch bugs from each sample was recorded and converted to a ft2 count.