拟松材线虫发生区与未发生区云南松死亡研究

Study on the Dead Pine of Pinus yunnanensis in Occurrence Area and Non-occurrence Area of Bursaphelenchus mucronatu

摘要: 对拟松材线虫发生区和未发生区400株死亡云南松的调查表明:松墨天牛、纵坑切梢小蠹和云南松木蠹象是云南松上的主要蛀干害虫。3种蛀干害虫的复合侵害是危害云南松林的主要方式。复合侵害时必有1种害虫为优势种。对拟松材线虫发生区与未发生区3种主要蛀干害虫进行对比后初步推断,松墨天牛可作为拟松材线虫的媒介昆虫。并针对3种蛀干害虫的复合危害提出了防治措施。

Abstract: The investigation result of 400 dead trees of Pinus yunnanensis reveals that Monochamus alternatus,Blastophagus piniperda and Pissodes yunnanensis are the main trunk borers causing death of the pine in occurrence area and non-occurrence area of Bursaphelenchus mucronatus.The main attacking way to the pine is the complex destruction of the three pests.In the complex destruction,one of the three pests always appears as dominant species.After a comparison of the destruction rate of the 3 pests,the longhorn beetle Monochamus alternatus can carry and spread the nematode Bursaphelenchus mucronatus.In the paper a control measure is proposed in accordance with the complex destruction of the three pests.