Permethrin decomposition after four month storage in the spray truck tanks during mosquito off season.
The concentrations of permethrin in the Aqua-Reslin formulation stored in the insecticide mixers/pumps, 16 ultra-low volume (ULV) truck-mounted spray tanks, and a stock container were sampled and analyzed by gas chromatography. The result showed that an average of 55.53% and 70.32% permethrin in Aqua-Reslin were decomposed in the ULV spray truck tanks and in the mixers/pumps, respectively, during the 4-month mosquito off-season. The degradation may directly result in economic loss. Also, the mosquito control efficacy may be compromised if the concentrations are inappropriate. The permethrin analytical method, economic cost, and degradation-prevention methods are discussed in this article.
Xue
Rui-De
RD
Anastasia Mosquito Control District, 500 Old Beach Road, St. Augustine, FL 32085, USA.
Qualls
Whitney A
WA
Zhong
He
H
Brock
Cate L
CL
D000818:Animals; D009033:Culicidae / Q000502:physiology*; D007306:Insecticides / Q000737:chemistry* / Q000191:economics; D026023:Permethrin / Q000737:chemistry* / Q000191:economics; D014677:Pharmaceutical Vehicles; D012621:Seasons; D013997:Time Factors
D007306:Insecticides; D014677:Pharmaceutical Vehicles; D026023:Permethrin