Abstract This test was con ducted in a mature, low-maintenance stand of Kentucky bluegrass and mixed weeds on the University of Kentucky intramural athletic fields, Lexington, KY. The turf was on a Maury silt loam (finesilty, mixed, mesic Typic Paleudalf) with pH = 6.4. There was no thatch. Plots (12 X 12 ft) were arranged in a RCB design with six replications. The turf was treated on 3 Aug, late in the flight of GJB. The site had a history of GJB infestation, and there was very heavy beetle flight for several weeks preceding the treatment. Conditions at the time of treatment were 86°F, with winds < 10 mph. The liquid applications were given at 50 gpa using a low volume, CO2 sprayer equipped with four Spraying System 8004 Tee Jet nozzles that delivered 2109 g pressure per cm2. Granular formulations were mixed with dry sand and applied to the plots by gloved hand. Each plot was syringed with about 1/8” water within 5 minutes after application, and the whole site was irrigated with about 3/4” (2 cm) of water as soon as the last treatment had been applied. There was 1.78 inches of rainfall on 5 Aug, and another 0.5 inch over the next 3 days. Plots were sampled on 26 Sep using an insecticide flush method that takes advantage of the fact that GJB grubs die on the turf surface following applications of conventional insecticides. Triumph 4E (isazophos) was applied at the labeled rate (2 lb(AI)/acre) using a Solo backpack sprayer. The flush spray was immediately syringed with 0.25” of water as before. Grub populations were assessed at dawn of the following day. A 2 X 2 m frame made from PVC pipe was placed in the center of each plot, and dead GJB grubs within the sample area were counted. Data were analyzed by two-way analysis of variance with means separated by Fisher’s protected LSD test.