4种农药对3种拟菊酯杀虫剂在不同光源下的光解效应

 以太阳光、氙灯、高压汞灯为光源，研究了哒嗪硫磷、多菌灵、克百威、丁草胺4种农药对氯氰菊酯、溴氰菊酯、氰戊菊酯3种拟菊酯杀虫剂的光解速度及光解效应的影响。结果表明：哒嗪硫磷、多菌灵对氯氰菊酯等3种拟菊酯杀虫剂在3种不同光源的光照处理下均表现出光敏降解效应；然而在太阳光及高压汞灯光源的光照处理下，克百威和丁草胺对３种拟菊酯杀虫剂具有光猝灭降解作用。太阳光照射下氯氰菊酯等3种拟菊酯杀虫剂的光解率与其单位面积上的药剂剂量成反比；而哒嗪硫磷等4种农药对3种拟菊酯杀虫剂的光敏或光猝灭效率与此4种农药的剂量成正相关

Effects of four kinds of pesticides on the photolysis of three pyrethroid insecticides under three illuminating lights

The photosensitive and photoquenching effects of phridaphenthion,carbendazim,carbofuran and butachlor on cypermethrin deltamethrin and fenvalerate on glass plate by xenon lamp,sunlight and high pressure mercury lamp illuminating respectively were studied.The photolytic rates of three pyrethroid insecticides were accelerated by phridaphenthion and carbendazim under these three illuminating lights;while photoquenching effects of carbofuran or butachlor on the photodegradation of the three pyrethroid insecticides were observed under the sunlight and high pressure lamp illuminating.The photolytic rates of the three pyrethroid insecticides were in inverse ratio to its own dosage,while the photosensitive efficiencies were in direct ratio to the dosage of phridaphenthion or carbendazim and the photoquenching efficiencies were in positive correlation with the dosage of carbofuran or butachlor under sunlight.