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研究论文

摘要：研究了哒嗪硫磷、多菌灵和克百威对三种菊酯杀虫剂（氯氰菊酯、溴氰菊酯、氰戊菊酯）的光敏降解效应.在0.03—2.66μg/cm²剂量范围内,哒嗪硫磷,多菌灵对3种拟菊酯杀虫剂有极显著的光敏效应,光解速度常数分别是拟菊酯杀虫剂单独照光的1.54—1.88倍和1.41—1.72倍.克百威对氯氰菊酯和溴氰菊酯有显著的光猝灭效应.当克百威和哒嗪硫磷共存时,克百威明显减弱哒嗪硫磷对氯氰菊酯和嗅氰菊酯的光敏效应,而增强对氰戊菊酯的光敏效应.

Abstract：Photosensitive or photoquenching effects of pyridaphenthion, carbendazim and carbofuran on photodegradation of cypermethrin, del tamethrin and fenva-lerate were studied. The photolytic rates of 3 pyrithroid insecticides were accelerated significantly by pyridaphenthion and carbendazim. A significant positive correlation between the dosage of photosensitizers and their photosensitive efficiency was observed, a negative correlation existed between the dosage of pyrithroid insecticides and photosensitive efficiency of the photosensitizers. As a photoquencher carbofuran delayed the photolytic rates of cypermethrin and deltamethrin. The photosensitive effect of pyridaphenthion on cypermethrin and deltamethrin was counterbalanced in some degree by carbofuran when photosensiti-zer and photoquencher coexisted with cypermethrin or deltamethrin.