前言经过我国科学家四十多年来的研究,现已明确柑桔黄龙病是由一种类细菌体(Ba-oterlum-Like Orgarism)引致的传染病病害,此种病原菌寄生于病株的韧皮部细胞内,用电子显微镜观察,可以见到外具三层膜的椭圆形、球形及其他形状的类细菌体颗粒。被害植株开始时在树冠发生少数黄化嫩 Foreword After more than forty years of research by Chinese scientists, it has been clarified that Citrus Huanglongbing is an infectious disease caused by Ba-oterlum-Like Orgarism, and this pathogen is parasitized in the phloem cells of diseased plants , Observed with an electron microscope, you can see the outer three-membrane oval, spherical and other shapes of bacteria-like body particles. The victim plants began to appear in the canopy a few yellow tender