杨树虫害动态与防治对策

山杨楔天牛(Saperda carcharias L.)及杨干隐喙象(Cryptorrhynchus lapathi L.)是欧洲大陆各国最严重的蛀干害虫,杨树人工林90%左右的损失是这类害虫造成的。多品种小面积、团状或带状混植及推行短轮伐期作业,把单功能的防护林改造成经营防护型,是有效防治这类害虫的根本对策。

Trends of Research on Poplar Insect Pests and the Strategy for Control

Poplar longicorn and poplar and willow weevil are the most serious trunk borers in the Continent. In the man-made poplar forests, about 90% of the damage is caused by these insects. In China, the most important insect pests are Glabrous spotted willow borer, Anoplophora glabripennis(Mtschulsky), Yellow spotted borer, A.nobilis Ganglbauer and brown mulberry borer, Aprioa germari (Hope). All the species are medium and large types in size, causing a vast amount of poplars to death. The accumlated economic losses are estimated at hundreds of millions of yuan. The stretches of planting with single species on large areas leads to the outbreak and overrunning of these insects in China; whereas the mass or strip mixed-planting of multi-species on small areas, practising short rotation operation and transforming single-functioned protective forests into managed-protective type of forests are the most effective measures to control the poplar insect pests.