松树萎蔫线虫病是松树的一种危险性流行病。它的病原是松材线虫 Bursaphelenchusxylophilus(Steiner et Buhrer 1934)Nickle 1970,以昆虫为传播媒介,同时随着被侵染的原木调运而迅速地扩展蔓延。一、分布与为害松树萎蔫线虫病最早于1905年在日本九州长崎市周围发生,之后,该病逐渐扩展到九州、四国和本州的广大地区。1939年松树的年损失量增加到20万立方米;1948年达123 Pine wilt disease is a dangerous epidemic of pine trees. Its pathogen is Bursaphelenchus xylophilus (Steiner et Buhrer 1934) Nickle 1970, an insect-borne media that spreads rapidly as the infected logs are transported. First, the distribution and damage pine wilt disease first occurred in 1905 in Nagasaki, Kyushu, Japan around the city, after the disease gradually expanded to Kyushu, Shikoku and the vast area of ​​the state. The annual loss of pine in 1939 increased to 200,000 cubic meters; in 1948 it reached 123