Application of residual contact insecticides early in peek of flies breeding could drop flies population density more than later, and could be cost saving and laboursaving comparing with space spray.

• 在苍蝇繁殖高峰前施用滞留性喷洒，可以取得更佳的灭蝇效果；在获得相同灭蝇效果的情况下滞留性喷洒可以比空间喷洒节省人力和药费。结论:滞留性喷洒是蝇类防制中值得推荐的灭蝇方法。