落叶松锉叶蜂发生与环境因子的关系

Relationship between the occurrence of Pristiphora laricis and the environment

落叶松锉叶蜂Pristiphora laricis(Hartig)是危害塞罕坝人工落叶松林的主要害虫,为控制其危害,掌握其发生规律,对影响落叶松锉叶蜂发生的环境因子进行了调查研究。结果表明,该虫的发生与林分、地形及气候因子关系密切,发生程度一般表现为纯林重于混交林,林缘重于林内,成熟林重于中幼龄林,树冠下层重于中上层,高海拔区重于低海拔区,阳坡重于阴坡,山脊重于山谷;温度越高越有利于幼虫的生长发育,幼虫孵化越早。

The occurrence of Pristiphora laricis （Hartig） was closely related to the forest stand conditions, topography and climatic factors. The infestation of Pristiphora laricis （Hartig） was more serious in pure stands, mature forests, higher altitude stands, southern slope and ridge than in mixture stands, middle aged and young forests, lower altitude stands, northern slope and valley. The pest occurred more serious along the forest edge than in the forest. And the higher the temperature was, the earlier the larvae hatched.