近年来,喷洒剂,气雾剂、蚊香的品种日益增多,现已较广泛地在我国使用,为迅速杀灭病媒昆虫,防止疾病的传播起到了一定的作用。为了鉴定上述产品药效的好坏。我们通常以测定其产品KT50的大小(击倒中时)及24小时死亡率的高低,来做为评价该药剂的重要依据。但目前据有关专家论证,要正确地测定KT50的效值,除要统一仪器,方法及记录表格外,还要尽可能地记 In recent years, there has been an increase in the number of sprays, aerosols and mosquito coils, which are now widely used in our country. This has played a role in rapidly killing vector insects and preventing the spread of diseases. In order to identify the efficacy of these products is good or bad. We usually determine the KT50 size of the product (when knocked down) and the 24-hour mortality rate as an important basis for evaluating the drug. However, according to the experts’ argumentation, the correct determination of the KT50’s value should be made in addition to the need to unify the instruments, methods, and record forms.