文献类型：期刊文献

英文题名：Surfactant effect on persistence of oxadiazolyl 3(2H)-pyridazinones against Pseudaletia separata walker

作者：Huang, Qingchun[1,2]; Wu, Jihua[1]; Kong, Yuping[1]; Liu, Manhui[1]; Cao, Song[1]

机构：[1] Shanghai Key Lab. of Chemical Biology, East China University of Science and Technology, Shanghai, China; [2] Shanghai Key Lab. of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, China

年份：2007

卷号：42

期号：3

起止页码：305

外文期刊名：Journal of Environmental Science and Health - Part B Pesticides, Food Contaminants, and Agricultural Wastes

收录：EI(收录号：20071310518106)

语种：英文

外文关键词：Bioactivity - Hydrocarbons - Organic acids - Photolysis - Substitution reactions - Ultraviolet radiation

摘要：The photodynamic decomposition of two new insect-growth inhibitors (IGRs), 2-tert-butyl-5-[5'-aryl-2'-(1',3',4'-oxadiazolyl)methoxy]-3(2H)-pyridazinones (OPB) and its 4-chloro substituted derivative (OPC), and effect of surfactants on persistence of their bioactivity were taken into investigation. Both chemicals were significantly induced to photolysis by ultraviolet light at 365 nm wavelength and their inhibitory activities against Pseudaletia separata larvae decreased with the increasing irradiation time. However, irradiation at 254 nm wavelength didn't cause their photodegradation. Triton X-100 and Succinic-sulfonie acidic sodium but not Tween 60 possessed strong capability to slow down the decomposition and obviously prolonged the half life of OPC in laboratory and field whilst effects of the three surfactants almost did not preserve the inhibitory activity of OPB. Data suggested that electron-withdrawing halogen (-Cl) on the π electron system in planar benzene-oxadialyl structures might reduce the efficiency of OPC on ultraviolet (UV) photoabsorption, and its hydrophobic interaction with the surfactants might be beneficial for forming stable micellar solubilization, thus sustaining the chemical's bioactivity. Copyright ? Taylor & Francis Group, LLC.