论文部分内容阅读
葡萄长须卷蛾［Ｓｐａｒｇｒａｎｏｔｈｉｓｐｉｌｌｉｅｒｉａｎａ（Ｄｅｎｉｓ＆Ｓｏｈｉｆｆｅｒｍｕｌｌｅｒ）］是我市落叶松幼树主要害虫之一。一般以２～６ａ生幼树受害最重，严重时幼树被害率高达７０％，平均被害率达４５．４％，通常每株树有虫一头，最多发现每...
Spargranothispillieriana (Denis & Sohiffermuller) is one of the major pests of Larix seedlings in our city. Generally 2 ~ 6a seedlings hardest hit, in severe cases the sapling rate as high as 70%, the average rate of 45.4% victimization, usually each tree has a worm, most found each ...