A study to determine transferable residues and absorbed dose of cyfluthrin to golfers following application to turfgrass was conducted. Five applications were made to 100 m x 30 m bentgrass plots with (3X) and without (2X) post-application irrigation. Dislodgeable foliar residues were collected using the modified California Roller Technique. Volunteers simulated the play of golf for 4 hours starting 1 hour after application. Transferable cyfluthrin residues were measured on whole body dosimeters and with personal air samplers, while absorbed dose was estimated from urinary metabolites collected from volunteers wearing shorts and short sleeve shirts. Dislodgeable foliar residues were reduced by 93% (from 0.0197 to 0.0012 �g/cm2) following post-application irrigation, significantly reducing the transferable residues collected on whole body dosimeters. Calculated Margins of Exposure (MOE) were > 200,000 for all applications based on the benchmark dose established by the US Environmental Protection Agency in the 2011 Pyrethroid Cumulative Risk Assessment.

Post-application irrigation reduces golfer exposure to the insecticide cyfluthrin

244th National Meeting (2012)

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