透视和俯视数十年来,在日本出现了松树(Pinus densiflora和P.thunbergii)的大规模死亡。为了查明其病原,从1968年开始即进行研究,结果在死松树的木质部检出无数的Bursaphelencus属线虫,最近鉴定为松木钝尾伞滑刃线虫(B.xylophilus)。把这种线虫接种到正常树上,实验结果证明它对松树具有强的致病力。这种线虫的主要传播媒介是松天牛(Monochamus Perspectives and Overlooks For decades, large-scale deaths of pine trees (Pinus densiflora and P.thunbergii) occurred in Japan. In order to ascertain its aetiology, a study was conducted since 1968 that resulted in the detection of countless Bursaphelencus nematodes in the xylem of dead pine, most recently identified as B. xylophilus. The nematode inoculated to the normal tree, the experimental results show that it has a strong virulence of pine. The main media for this nematode is Monochamus