马尾松是我国南方十三省(区)的主要造林树种之一,在国民经济中占有极其重要的地位。马尾松丛枝病过去未有报道。我们于1978年在广州市白云山首次发现此病害,以后经1980、1981两年全省森林病虫普查,进一步查清此病害普遍发生在我省马尾松种植区,近年来广西各地亦相继有所发现,个别 Masson pine is one of the main afforestation species in thirteen provinces (autonomous regions) in southern China, occupying an extremely important position in the national economy. Masson pine broom disease has not been reported in the past. We found the disease for the first time in Guangzhou Baiyun Mountain in 1978. Afterwards, the survey of forest diseases and insect pests in the whole province in 1980 and 1981 further clarified that the disease occurred in the masson pine growing area in our province. In recent years, Guangxi also successively Found, individually