title: The dissipation of ethofenprox in cabbage and soil under open conditions.
abstract: The dissipation of ethofenprox in cabbage and soil under open conditions was investigated at two primary cabbage-growing regions, Beijing and Kunming in China. Samples were extracted with acetonitrile and determined by ultra-performance liquid chromatography with a single quadrupole detector. Dissipation of ethofenprox from cabbage and soil can be best explained by a first-order decay process. The half-lives of ethofenprox were 1.9 and 2.3 days in cabbage and 20.0 and 13.0 days in soil at Beijing and Kunming, respectively. The concentration of ethofenprox residue was reduced by 90% taking 7 and 60 days in cabbage and soil. Dissipation rates in cabbage and soil at two geographically separated experimental fields differed, suggesting that this was affected by complicated factors, such as local climate and soil characteristics. These data could provide guidance for the proper and safe use of this pesticide on cabbage in China.
authors.affiliation: Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, Laboratory of Insect Toxicology, South China Agricultural University, Guangzhou 510642, China.
authors.forename: Dali
authors.initials: D
authors.lastname: Sun
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.forename: Hongwu
authors.initials: H
authors.lastname: Liang
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.forename: Ran
authors.initials: R
authors.lastname: Ji
authors.forename: Yijun
authors.initials: Y
authors.lastname: Wu
authors.forename: Chenglan
authors.initials: C
authors.lastname: Liu
mesh_terms: D001937:Brassica / Q000737:chemistry*; D002681:China; D004784:Environmental Monitoring; D006207:Half-Life; D007306:Insecticides / Q000032:analysis* / Q000737:chemistry; D011722:Pyrethrins / Q000032:analysis* / Q000737:chemistry; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis* / Q000737:chemistry
chemical_list: D007306:Insecticides; D011722:Pyrethrins; D012987:Soil; D012989:Soil Pollutants; C076840:ethofenprox