严重威胁我国广东、福建、广西柑桔生产的黄龙病,近几年又相继在四川、云南、贵州、湖南、江西和浙江等省的部分桔区被发现。广西是老病区,1982年黄龙病普查时发现,发病范围已由50年代的9个县的少数公社零星发病发展到62个县、市的381个公社(乡)及国营农场。其根本原因就是由于随着柑桔生产的快速发展,疫区内的带病苗木大量涌进新区而造成的。 Huanglongbing, which has seriously threatened the production of citrus in Guangdong, Fujian and Guangxi in our country, has been discovered in parts of the provinces of Sichuan, Yunnan, Guizhou, Hunan, Jiangxi and Zhejiang in recent years. Guangxi is an old ward. In the 1982 Huanglong Census, it was found that the incidence ranged from sporadic incidents of minor communes in 9 counties in the 1950s to 381 communes (townships) and state-owned farms in 62 counties and cities. The fundamental reason is that with the rapid development of citrus production, a large number of diseased seedlings poured into the new area.