Environmental Monitoring and
BibTeX
@MISC{Helliker_environmentalmonitoring,
author = {Paul E. Helliker and Gray Davis and Winston H. Hickox and John Sanders and Johanna Walters},
title = {Environmental Monitoring and},
year = {}
}
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Abstract
applicators applied carbaryl to control the glassy-winged sharpshooter (GWSS) in Fresno County, California. During this time, the Department of Pesticide Regulation (DPR) collected air, tank, leaf, and produce samples at several sites within the cities of Fresno and Clovis. Air samples were taken at five locations before, during and after the applications. The highest concentrations occurred during applications and then declined over the next 48 hours. The highest concentration of 237 parts per trillion (ppt) detected was well below the preliminary health screening level of 6,3 13 ppt for 24-hour acute exposure to carbaryl. Tank samples showed concentrations ranging from 0.1 % to 0.15 % of carbaryl active ingredient within the nominal label-rate concentrations of 0.11 % to 0.21%. Dislodgeable foliar residue from leaf punches had concentrations ranging from 2.97 to 7.12 pg/cm2. The ten fruit and vegetable samples collected at preharvest intervals, the required minimum number of days between last application and harvest as determined by the label for “7 ” Carbaryl
Keyphrases
environmental monitoring several site dislodgeable foliar residue required minimum number last application pesticide regulation leaf punch 24-hour acute exposure carbaryl active ingredient vegetable sample fresno county glassy-winged sharpshooter air sample nominal label-rate concentration pg cm2 preliminary health ten fruit
