松材线虫病是近２０年来传入我国的一种毁灭性松树病害，它由天牛和人为传播。通常感染后两个月左右即可造成松树枯死，３～５年即可摧毁成片的松林。该病在日本、韩国、美国、加拿大、墨西哥等国都早有发生。日本是受松材线虫病危害最严重的国家，几乎造成了赤松林和黑松... Pine wood nematode disease is a devastating pine tree disease introduced into our country in recent 20 years. It is transmitted by celastrus and human. Usually two months after infection can cause pine dead, 3 to 5 years to destroy pieces of pine forest. The disease in Japan, South Korea, the United States, Canada, Mexico and other countries have long occurred. Japan is the country hardest hit by pine wood nematode disease and has almost caused the red pine and black pine ...