黄龙病在我区的大部分柑桔产区均有发生。据一九六三年至一九六四年调查,除少数地区,如靖西、德保未见发病,阳朔、桂林、灌阳、兴安、龙胜、三江和全州等地基本上不发病外,其它地区都有黄龙病发生。在各品种中,除枳不显症状外,黄龙病可以为害所有常见的柑桔类植物。黄龙病症状的田间诊断“黄梢”和“斑驳”是田间诊断病树的主要依据。大树都是由部分枝条先发病,逐渐扩 Huanglongbing in most of my citrus areas have occurred. According to a survey conducted between 1963 and 1964, except for a few areas such as Jingxi and Debao, incidences in Yangshuo, Guilin, Guanyang, Xing’an, Longsheng, Sanjiang and Quanzhou remained basically unchanged except in a few areas In addition, other regions have Huanglong disease. In all varieties, except that citrus aurantium is not obvious symptoms, Huanglongbing can harm all common citrus plants. Huanglong disease symptoms of field diagnosis “tip” and “mottle” is the main basis for field diagnosis of diseased trees. The trees are by the first part of the disease, and gradually expanded