柑桔黄龙病对柑桔生产的严重威胁已为众所周知,我国对柑桔黄龙病的研究已有几十年的历史。现在,黄龙病在许多柑桔产区依然猖獗为害,并有进一步扩大发展的趋势。这就不能不引起人们的深思,我们在与黄龙病的斗争中是胜利了还是失败了。现在还很难下结论。正如林孔湘教授指出的:“多年来黄龙病一直被许多人说成是老大难问题。假如这是指本病一直没有得到很好的防治,那还是说对了。但他们指的是科研工作没有取得成果,这就与事实 Citrus Huanglongbing on the serious threat to the production of citrus is well known, our citrus Huanglongbing has decades of history. Now, Huanglongbing is still rampant in many citrus producing areas and has the tendency of further expanding its development. This can not but cause people’s deep ponder over whether we won or failed in the fight against the Yellow Dragon. It is still difficult to draw conclusions. As Professor Lin Kong-xiang pointed out: "For many years, Huanglong’s disease has been said by many to be a chronic problem. If this means that the disease has not been well controlled, that is right, but they mean that scientific research has not Achievements, this is true