目的评价4%氯硝柳胺乙醇胺盐粉剂在山丘地区杀灭钉螺效果。方法在石台县山丘地区选择沟渠和坡地等有代表性的有螺环境,分别采用4%......

Malaria control programme utilizing indoor residual spraying of chemical insecticide is only effective if a high coverag......