Effects of Three Kinds of Pesticides on the Photo-degradation of Iprodione and Its Inter-relationship
The effects of three pesticides (chlorpyrifos,triadimefon and cyhalothrin) on the photo-degradation of iprodione were studied under the illumination of high-pressure mercury lamp. The photolytic rates of the iprodione were accelerated with a ratio (1∶1) of iprodione to either of the three pesticides,the order of photosensitive efficiencies was:chlorpyrifostriadimefoncyhalothrin;when the ratio changed to different dosages of chlorpyrifos,we observed the photosensitive efficiencies were in inverse ratio to its own dosage and irradiation time.At the same time,the rates of triadimefon were increased in the case of iprodione.Meanwhile,the effects of iprodione on the photo-degradation of chlorpyifos were investigated.The photosensitive efficiencies were in positive correlation with dosage of chlorpyrifos at the lower ratio,and the photoquenching efficiencies were in inverse ratio to its dosage at the higher ratio.