论文部分内容阅读
1981～1989年用百余种农药对稻田害虫天敌泽蛙(Rana limnocharis)的蝌蚪、幼蛙和成蛙进行了毒性测定和田间试验,发现杀虫剂的安全性比杀菌剂、除草剂要小.从药量安全指数和48h 的LC_(50)值来看,杀虫剂中拟除虫菊酯类、有机氯类以及沙蚕毒素、杀虫环、杀螟丹、嘧啶硫磷、治螟磷、百菌清、菲醌、苏化911、五氯酚钠、毒草安等品种安全性小.乳油剂的安全性比可湿性粉剂小.混合制剂及不同作用机制的药剂混配安全性变小.泽蛙对农药敏感,尤以蝌蚪最敏感.农药对泽蛙蝌蚪急性毒性可分3类,室内48h LC_(50)值小于1ppm,田间48h 药量安全指数小于0.5时,为高毒类;室内LC_(50)为1～10ppm,田间48h 药量安全指数为0.5～2.5时,为中毒类;室内LC_(50)大于10ppm,田间48h 药量安全指数大于2.5时,为低毒类.
From 1981 to 1989, the tadpoles, frogs and frogs of Rana limnocharis were tested for toxicity and field trials with more than 100 kinds of pesticides. The results showed that insecticides were less toxic than fungicides and herbicides From the dose safety index and the value of LC_ (50) at 48h, pyrethroids, organochlorines and nereistins, insecticidal rings, cartap, pyrithione, Chlorothalonil, phenanthrene quinone, benzalkonium chloride 911, pentachlorophenol sodium, narcotics, etc. The safety of the emulsifier is smaller than that of the wettable powder, and the safety of compounding with different formulations and different mechanisms of action is diminished. Rhododendron is sensitive to pesticides, especially the tadpole most sensitive.The pesticides on the frog tadpole acute toxicity can be divided into three categories, 48h LC_ (50) value of less than 1ppm, field 48h drug safety index is less than 0.5, LC 50 was 1 ~ 10ppm, field 48h dose safety index was 0.5 ~ 2.5, it was poisoned. Indoor LC 50 was more than 10ppm, field 48h dose safety index was greater than 2.5, it was low toxicity.