论文部分内容阅读
在我区为害杨、柳树种的片角叶蝉属(Idiocerus),已知的有黑尾片角叶蝉(Idioceru s koreanus Mats.)、绿片角叶蝉(I.urakawensis Mats.)和杨花片角叶蝉(I.sp.)三种。前两种主害柳树,也害杨树,后一种主害杨树兼害柳树,发生势态均颇优势。为害方式是刺吸树木汁液,一般只造成树木某种程度的内亏,不形成其它明显害状,因而常不被人们所注意。但在1981年4月间,杨花片角叶蝉在我院林科所的杨树试验苗圃中,竟对苗木的生长造成严重为害,这是过去没有出现过的新现象。
Idiocerus, a species of Ipomoea koreanus Mats., I.urakawensis Mats., Known to be poplar and willow, Three kinds of leafhopper (I.sp.). The first two kinds of main willow trees, but also the poplar, the latter main poplar and willow, the occurrence of the situation are quite advantageous. Harm way is to suck the tree juice, generally only cause a certain degree of loss of trees, do not form other obvious harm, and therefore often not be noticed. However, in April 1981, the poplar leafhopper in the Linke’s poplar test nursery in our hospital, actually caused serious damage to the growth of seedlings, which is not seen in the past a new phenomenon.