Abstract: A rodenticice named Dushuling in Chinese is an extraction of the plant-Rhododendron przeweskii.Its molecular formula is C₂₂H₂₆O₇, and molecular weight of that is 412.Its toxicity has been examined with sorre rcdents and domestic animals. The results are as following (See table).According to the results of the experiments, Dushuling dees not cause any tolerance and secondary haxard toxicity in the lab and the efficiency of rodent control the Ochotona curzoniae, is 97.92% with the cats contained 0.1% Dushuling in the field.

摘要： 迄今为止,应用于鼠防工作中的化学杀鼠剂中有些品种已被广泛应用,并已取得了良好效果;但多数品种仍然存在不少缺点,主要是二次中毒现象。如长期采用具二次中毒的杀鼠剂进行灭鼠,则往往伤害鼠的天敌,从而破坏了生态平衡,给鼠害的再猖獗创造了有利条件。为了更好地开展鼠害防治工作,寻找高效安全而不伤害天敌的杀鼠剂已成为灭鼠工作者的共同愿望。笔者于1980年7月至1981年1月分别在青海省门源马场、互助县城关公社和四川省温江地区城镇和农田等地首次将杜鼠灵试用于害鼠防治工作,做了一系列试验。