论文部分内容阅读
德宏垦区冬期寒害造成胶树烂脚、烂皮较重,常遭多种小蠹虫为害,尤以黑小蠹Xyleborub sp.褐小蛀Pytyogencs sp.和/乙齿长小蠧Platypodielae sp.三种为害最烈。胶树木质部被小蠹虫蛀入为害后,虫孔隧道纵横交错,不仅破坏木质部的正常输导作用,而且大大减低胶树的抗风能力。我站七六至七七年因风断倒的一千余株胶树中,调查小蠹虫为害率达80％以上,可见小蠹虫不防不行。
Dehong reclamation area caused by winter cold damage gum tree rotten feet, rotten skin heavier, often by a variety of beetles damage, especially the black beetle Xyleborub sp. Brown small moth Pytyogencs sp. And / / Betula platypodielae sp. Most damaging. After the gum tree xylem is bored by bark beetles, the wormhole tunnel crosses in a crisscross pattern, which not only destroys the normal conduction of xylem, but also greatly reduces the wind resistance of the gum tree. I stand seven or seven to seven years due to wind down more than a thousand gum trees, the investigation of beetles pest damage rate of 80% or more, we can see beetles not prevent it.