Degradation dynamics and combined effect of chlorpyrifos and emamectin benzoate in cabbage and on the glass | 毒死蜱和甲胺基阿维菌素苯甲酸盐在甘蓝及玻片上的消解动态与复合效应研究

chinois. 研究毒死蜱、甲胺基阿维菌素苯甲酸盐（以下简称甲维盐）单剂以及两者的混剂在田间甘蓝中的消解动态和室内玻片上的光解情况。田间试验表明，单剂与混剂中的毒死蜱在甘蓝中的消解半衰期差异不显著，甲维盐在甘蓝中的消解半衰期差异显著。光解试验表明，甲维盐与毒死蜱的剂量比为10：1时，甲维盐对毒死蜱的光解产生显著的促进作用，其作用效应与剂量比成正相关；毒死蜱与甲维盐剂量比为3：1时，毒死蜱对甲维盐的光解产生显著的促进作用，剂量比为5：1时达到饱和。结合田间试验毒死蜱与甲维盐在甘蓝中的初始剂量比为168：1，表明过量的毒死蜱加快了甲维盐在甘蓝中的消解，而低剂量的甲维盐对毒死蜱在甘蓝中的消解影响不显著。[著者文摘]

anglais. The residual dynamics and photolysis of chlorpyrifos, emamectin benzoate and their mixture in cabbage and on the glass were studied respectively. The results of field experiments showed that there was no significant difference of the degradation half-life of chlorpyrifos between the single and the mixture ingredient in cabbage, while emametin benzoate was significant. The results of photolysis experiments showed that emamectin benzoate affected the degradation of chlorpyrifos apparently with a dosage ratio of emamectin benzoate to chlorpyrifos 10： 1, positive correlations between efficiency and dosage ratio. When a dosage ratio of chlorpyrifos to emamectin benzoate was 3： 1, chlorpyrifos accelerated the degradation of emamectin benzoate apparently. Effects were not stronger with the increase of dosage ratio. It was high enough to accelerate the degradation of emamectin benzoate with the dosage ratio of chlorpyrifos to emamectin benzoate 5： 1. The initial dosage ratio of chlorpyrifos and emametin benzoate was about 168：1 in cabbage after spraying pesticide, which proved that excessive chlorpyrifos accelerated the degradation of emamectin benzoate in cabbage apparently, while low dosage of emamectin benzoate had little effect on the degradation of chlorpyrifos in cabbage.