Spring Management of Bluegrass Billbug With Scimitar And Merit At The Valentine Research Center, University Park, Pennsylvania, 1995:

Abstract

Abstract The field plot consisted primarily of Kentucky bluegrass. Treatment plots were 9 X 6 ft, arranged in a complete randomized block design and replicated 4 times. Granular formulations were applied with a hand-held shaker and mixed with blank granules to facilitate product distribution. Liquid formulations were applied by using a CO2 sprayer with 4 8004VS TeeJet nozzles mounted on a 6 ft boom, operating at 28 psi, and applied in 1021 ml of water/54 ft2 or delivering 5 gal/1000 ft2. At treatment time (19 May), the following soil and environmental conditions existed: air temperature, 60° F; soil temperature at 1 inch depth, 72.0° F; soil temperature at 2 inch depth, 66.0° F; RH, 69%; amount of thatch, 0.25-0.5 inches; soil textural class, silt loam; soil particle size analysis: 19.0% sand, 57.0% silt, 24.0% clay; organic matter, 4.0%; soil moisture (oven dry weight), 25.5%; water pH, 7.0; soil pH, 6.8; application time, mid-afternoon; and skies were partly cloudy. Immediately after treatment the experimental area was irrigated with 0.125 inch of water. Posttreatment counts were made 40 (28 Jun) and 45 (3 Jul) DAT. Bluegrass billbug control was evaluated by removing four 0.087 ft2 sod samples from each replicate, and the total number of bluegrass billbug life stages (larvae, pupae, adults) were recorded from each sample and converted to a ft2 count. Sod samples were removed with a 4-inch cup cutter.