在美国南卡罗来纳州的Charleston和Georgetown两县,马拉硫磷长期用作杀成蚊药。本研究测试了两县11个点4种蚊对马拉硫磷及其他杀虫剂的敏感性。 野外采集成蚊、幼虫或蛹,后两者养至成蚊,用WHO诊断剂量方法测定雌蚊对杀虫剂的敏感性。将25只雌蚊置于测试管中,管内壁衬以用诊断剂量杀虫剂浸透的滤纸,暴露1小时,24小时后记录死亡率。 In the United States, Charleston and Georgetown counties in South Carolina, malathion has long been used as an anti-mosquito drug. This study tested the susceptibility of 4 mosquitoes to malathion and other insecticides at 11 sites in two counties. Adult mosquitoes, larvae or pupae were harvested in the field, and both were raised to adult mosquitoes. The sensitivity of the female mosquitoes to insecticides was determined by the WHO diagnostic dose method. Twenty-five female mosquitoes were placed in test tubes lined with filter paper impregnated with a diagnostic dose of insecticide for 1 hour and after 24 hours mortality was recorded.