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各地过去大量使用二二三、六六六杀灭蚊、蝇、蚤、虱、白蛉等病媒昆虫。如想知道这方面所获得的效果如何?只有通过观察调查效果的办法才可能办得到。如过去有些地区在杀虫前后做些蚊、蝇、蚤、白蛉等密度调查和观察该地区传染病发病情况,这些材料虽然还不算完全,但是它却说明了二二三、六六六杀虫效果很好,对虫媒传染病发病减少方面也可能比较出来它的有效作用。但因调查范围小、时间短、观察方法不全面,材料不够完整,对客观影响或其他因素考虑不够,以及有的地方不做对照试验等,以致不能用系统的完整的科学根据,把它在实际中起到的有效作用肯定下来;有些地区虽改进了消毒方法,但因没有详细的观察材料
In the past, a large number of vector insects such as mosquitoes, flies, fleas, lice, and whitefly were used to kill a large number of people in the past. If you want to know how effective this area is, you can do it only by observing the results of the investigation. In the past, some areas such as mosquitoes, flies, fleas and white flies were surveyed before and after insecticide and the incidence of infectious diseases in the area was investigated. Although these materials are not yet complete, they have shown that 2363 and 666 Insecticidal effect is good, reduce the incidence of insect-borne diseases may also be out of its effective role. However, due to the small scope of the investigation, the short time, the incomplete observation method, the incompleteness of the materials, the insufficient consideration of objective effects or other factors, and the lack of controlled trials in some places, it can not be completely scientifically based on the system. The actual effect played by the affirmation; although some areas to improve the disinfection method, but there is no detailed observation of the material