测定昆虫的半数致死量(LD_(50))是衡量群体抗性水平的标准。用点滴法测得的LD_(50)在化学杀虫剂毒力测定中是最准确的方法,常被生物工作者所采用。在操作时,使试虫能安静地受药是点滴法测定的重要步骤。为使试虫安静,以往在实际工作中常用乙醚、氯仿等麻醉方法。试虫经麻醉后,是否能干扰昆虫机体的生理功能,对点滴法测定的LD_(50)结果有 The median lethal dose (LD_ (50)) of insects was measured as a measure of the level of population resistance. The LD_ (50) measured by the trickle method is the most accurate method for the determination of toxicity of chemical insecticides and is often used by biologists. During operation, it is an important step for the test insects to be able to take medicine safely. In order to make worms quiet, in the past often used in the actual work ether, chloroform and other anesthetic methods. After anesthesia, whether it can interfere with the physiological function of insects, LD_ (50) of the results of the drop method