甘薯象鼻虫(Cylas Formicarius F.)属鞘翅目,象鼻虫科。广东农民一般称它为“沙虱”“沙辣子”、“沙虫”等,为甘薯主要害虫之一。在广东栽培甘薯地区均有分布,其中以海南岛,粤西区被害最甚。据文献记载,已知此虫在国内分布于浙江、福建、台湾、广西、江西、云南、湖南等省。此虫不仅在甘薯生长期间为害,贮藏期间 Cylas Formicarius F. is a Coleoptera, weevil family. Guangdong farmers generally call it “one of the main pests of sweet potato,” such as “Siphon” “sand spicy child ”, “sand worm ” and so on. In the cultivation of sweet potato in Guangdong are distributed, of which the most severely victimized in Hainan Island, western Guangdong. According to the literature, it is known that the insects are distributed in Zhejiang, Fujian, Taiwan, Guangxi, Jiangxi, Yunnan and Hunan provinces. This insect is not only harmful during the growth of sweet potato, during storage