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松线虫 Bursaphelenchus mucronatus,Mamiya et Ende,1979)也称松材线虫、松木线虫和松干线虫,在日本是一种危险性线虫。松树一旦感染上此线虫,无论树龄大小,树势强弱,几个月内就会枯死。1978年日本灾情达到高峰,木材年损失量为243万立方米,占全国木材年需要量的2％。目前除北海道外,几乎蔓延至全国。法国东南部的地中海沿岸(1977),美国在33个州也发现有线虫发生(1979)。 1980年10月,我们在浙江省肖山县北干山考察松干蚧时,发现松树枯死株率达32％,受害对象有马尾松、黑松。我们在考察树木致死原因时,除发现被松褐天牛(Monochamus al-ternatus Hope)危害外,还怀疑有线虫。1981年6月采到几头新羽化的松褐天牛成虫,发现
Bursaphelenchus mucronatus, Mamiya et Ende, 1979), also known as pine wood nematode, pine wood nematode and pine wood nematode, are dangerous nematodes in Japan. Once infected with pine nematodes, regardless of age, tree strength, will die within a few months. In 1978, the disaster in Japan peaked at an annual loss of 2.43 million cubic meters of timber, accounting for 2% of the national annual timber needs. Currently except Hokkaido, almost spread to the whole country. The Mediterranean coast of southeastern France (1977) and the United States also found nematodes in 33 states (1979). In October 1980, when we investigated Pinctada sinensis in the northern part of Xiaoshan County, Zhejiang Province, we found that the percentage of dead trees in the pine tree was 32%. The victims were Pinus massoniana and Pinus thunbergii. When we examined the causes of tree lethality, we also suspected nematodes in addition to those found to be Monochamus al-ternatus Hope. In June 1981, several new eclosion adult brown beetle adults were collected and found