四种农药对蛙类的毒性与评价

Study on toxicity of four pesticides on frog and their evalua-tion.

测定了甲基异柳磷等四种新农药对泽蛙蝌蚪的毒性，作出了安全性预评价。结果表明：四种农药对蛙类均为无实际危害的低毒农药。克草胺施药期与蛙类蝌蚪期正相吻合，因此在使用时应采取措施，尽量避免对蛙类蝌蚪的毒害。

In this paper, the toxicities of four new pesti-cides on Rana limnocharis tadpole were tested, and their safety pre-evaluations were made.the results show that these pesti-cides are low-toxic to frog. Since the application time of propachlor is consistent with tadpole growth period of the frog,it is suggested that measures should be taken in order to protect tadpole from propachlor wheen it is applied.