松材线虫(Bursaphelenchus lignicolus Mamiya et Kiyohara)首次发现于日本枯死的松树体内,据报道该属线虫有记载的计20种,而于树干内寄生的现象,还是首次发现。目前在日本松材线虫病是一种毁灭性的松树病害,1971年以来,几乎每年的枯损量均在100万立方米以上。1982年,仅用于防治松材线虫的费用即达71亿8268万日元(折合人民币5200万元),占日本政府森林病虫害防治经费总预算的95%,是日本当前森林病害研究的重 Pine wood nematode (Bursaphelenchus lignicolus Mamiya et Kiyohara) was first found in dead Japanese pine trees. It is reported that there are about 20 recorded species of the genus Nematode, and the parasitic phenomenon in the trunk is the first discovery. Pine wilt disease is currently a devastating pine disease in Japan, and since 1971, the annual wilt losses have been above 1 million cubic meters. In 1982, the cost for preventing and controlling pine wood nematode reached 7,182.88 million Japanese yen (equivalent to 52 million yuan), accounting for 95% of the total budget of the Japanese government for forest pest and disease control and the weight of Japan’s current forest disease research