芦毒蛾Ｌａｅｌｉａｃｏｅｎｏｓａ（Ｈｕｂｎｅｒ）是芦苇上的重要食叶害虫，本文记叙了芦毒蛾在湖南沅江对荻和芦的危害情况、生活史、幼虫历期、幼虫食叶量和食物得用指数．......

The principal component method is to recombine multiple correlated indexes into a group of non-correlated comprehensive ......