Management of A White Grub Complex Prior to Egg Lay with 1.5-G Formulations of Halofenozide and Mach-2 Liquid Insecticide, 1997

The turfgrass area consisted primarily of Kentucky bluegrass (70%) and annual bluegrass (30%). Treatment plots were 8 X 6 ft, arranged in a RCB design and replicated 3 times. Liquid formulations were added to 2.5 gal water and applied with a hand held sprinkling can. Granular formulations were applied with a hand-held sprinkling can. Granular formulations were applied with a hand-held shaker and mixed with fine top-dressing sand to facilitate product distribution. At treatment time (10 Jun) the following soil and environmental conditions existed: air temperature, 86° F; soil temperature at 1-inch depth, 80° F; soil temperature at 2 inch, 70° F; RH, 45%; amount of thatch, 0.125-0.375 inch; soil textural class, loam; soil particle size analysis: sand, 36.6%; silt, 47.5%; clay, 15.9%; organic matter, 3.4%; soil percent water content (percent by weight), 13.9; water pH, 7.0; soil pH, 6.8; application time, late morning; and skies sunny. Immediately after application treatments were irrigated in with 0.1 inch of water. Post-treatment counts were made on 30 Sep. Three ft2 sod samples were randomly taken from each replicate, and the total number of JB and NMC grubs/ft2 was recorded.