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甘薯小象鼻虫,主要以幼虫在薯块和薯蔓基部为害。被害处变黑、发苦,并有特殊的腥臭味,不能食用;也不能作饲料。关于甘薯小象鼻虫的发生情况,1934年浙江昆虫局曾进行过调查。而比较系统的调查研究始于1956年以后。 一、甘薯小象鼻虫的种类 甘薯小象鼻虫的学名,最早在1792—1794年Fabricius订为Brentus formicarius(印度种)。1807年Olivers订为Cylas formicarius Fab.。1875年Summers订为Otidocephahus elegantulus。1918年Pierce根据成虫触角和颜色差异,认为为害甘薯Cylas属的象鼻虫有三种,另两种为Cylas turcipennis Boheman;Cylas femoralis Faust。
Sweet potato weevil, mainly larvae in the tubers and potato vine base damage. Victims of dark, bitter, and have a special stench, can not eat; nor can feed. On the sweet potato weevil occurrence, in 1934 Zhejiang Entomological Bureau had conducted a survey. The more systematic investigation began after 1956. First, the sweet potato small weevil species Sweet potato weevil scientific name, as early as 1792 - 1794 Fabricius ordered Brentus formicarius (Indian species). Olivers booked Cylas formicarius Fab in 1807. Summers 1875 set Otidocephahus elegantulus. 1918 Pierce According to adult antennae and color differences, that damage to sweet potato Cylas genus three weevils, and the other two Cylas turcipennis Boheman; Cylas femoralis Faust.