前言木麻黄是我国南方沿海地区用作防风固沙、行道树和用材林的优良树种。近年来,木麻黄丛枝病普遍发生于广州、肇庆、佛山、汕头、惠阳、梅县等地区。特别是幼苗感病更为严重。华南农业大学苗圃的木麻黄幼树亦不同程度地感染了此病。 1983年,张景宁等通过病组织超薄切片等技术检查,认为此病的病原为类菌原体和类立克次细菌,是一种复合感染,传病介体为菱纹叶蝉和短头叶蝉。但对其病原的分离培 Foreword Casuarina is an excellent tree species used as windbreak and sand fixation, street tree and timber forest in the southern coastal areas of our country. In recent years, casuarina witches perch generally occur in Guangzhou, Zhaoqing, Foshan, Shantou, Huiyang, Meixian and other regions. In particular, young seedlings are more serious. South China Agricultural University Nursery Casuarina is also infected with varying degrees of the disease. In 1983, Zhang Jingning and other organizations through the ultra-thin slices and other technical inspection, that the pathogen of the disease is mycoplasma and Rickettsia bacteria, is a compound infection, the transmission mediator is the diamond leafhopper and short head Leafhoppers. But the isolation of their pathogen