木麻黄青枯病是由青枯假单胞杆菌(Pseudomonas solanacearum E.F.Smith)升起的一种严重的木麻黄(Casuarina spp.)病害,广东、广西、福建等省(区)均有发生。广东省惠来和潮阳两县在1969年受害面积达4万亩以上。1985年4号台风过后,陆丰县沿海也发生木麻黄青枯病大流行,枯死达万亩以上。该病是一种维管束病害,早期诊断极为困难,当肉眼可见的植株外部症状表现时,药物防治为时已晚。到目前为止,世界上尚未找出一个经济有效的青枯病化学防治方法。国内外大量的研究资料表明,解决青枯病问题的重要途径是选育和推广抗病品种。木麻黄青枯病在我国沿海地区发生已有二十多年历史,在严重发病区经过自我筛选,遗留下一些健康的植株,这些植株是抗青枯病 Casuarina fumigatus is a serious Casuarina spp. Disease that is caused by Pseudomonas solanacearum E.F. Smith and occurs in all provinces of Guangdong, Guangxi and Fujian provinces. Huilai and Chaoyang counties in Guangdong Province hit an area of ​​over 40,000 mu in 1969. After the typhoon No.4 in 1985, a large-scale epidemic of casuarina tuberous wilt occurred along the coast of Lufeng County, withered up to more than 10,000 mu. The disease is a vascular disease that is extremely difficult to diagnose in the early stages of disease. It is too late to prevent the disease when the external symptoms of the plant are visible to the naked eye. So far, no economically effective chemical control of bacterial wilt has been identified in the world. A large number of domestic and foreign research data show that an important way to solve the problem of bacterial wilt is to breed and promote disease-resistant varieties. Casuarina fumigatus has been in the coastal areas of our country for more than 20 years and has been self-screened in the severely affected areas, leaving behind some healthy plants that are resistant to bacterial wilt