Abstract
Abstract Treatments were applied 19 Aug at Deerfield C.C. Experimental plots were arranged in a RCB design, replicated 4 times. Plot size was 8 X 8 ft. The average no. grubs in pretreat samples was 37.7/ft2 (73% Japanese beetle, 27% northern masked chafer). Granules were applied with a hand held glass jar shaker and liquids with a sprinkler can. Liquid formulations were applied in two liters of water per plot and all plots irrigated with about two liters of water about five min after application. Water pH was 6.9. Environmental and soil conditions at treatment were as follows: air temperature, 20°C; RH, 83%; overcast (fog); soil, moist to wet; soil temperature, 22°C (1 inch); pH, 4.55; organic matter, 10.10%; soil type, silt loam (sand 22.2%, silt, 64.1%, clay 13.7%); thatch layer 1/8 to 3/8 inches (compressed). Total precipitation during trial period was 3.90 inches. Plots were sampled 35 DAT with a cup changer (4.25 inches diam) to a depth of 2-3 inches; 4 random samples were taken per plot.
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