除苗圃中苗床外,线虫一般不被认为是林木的重要病原,大多数的林木病原线虫发现于土壤,且导致树木缓慢衰退,但不迅速死亡。可是,松材线虫在美国的最新发现,已使病理学家们改变看法,因为该线虫在日本森林已引起为害流行。松材线虫Bursaphelenchus Lignicolus首先由Mamiya和Kiyohara(1972)描述。最初 In addition to the seedbed in the nursery, nematodes are generally not considered important pathogens of trees, most of which are found in the soil and cause the trees to decline slowly but not to die quickly. However, the latest findings of pine wood nematodes in the United States have changed the pathologists’ view that the nematodes have caused detrimental effects in Japanese forests. Bursaphelenchus Lignicolus was first described by Mamiya and Kiyohara (1972). initial