泡桐丛枝病又叫疯病、扫帚病、鸟巢病,是泡桐生产中的严重病害。在河南等十余个省市均有不同程度的分布,以华北平原为害严重。近年来,在我省也有发生,局部地方,日趋严重。据天水、庆阳、平凉三个地区十一个县(市)的初步调查,均有不同程度的发病。天水地区的天水市、徽县、西和、天水县、张川县、秦安县、漳县和武山等七个县(市)的三十三个城镇、单位和社队栽植五至七年生的兰考桐2754株,其中,轻病株(枝条感病三分之一 Paulownia witches broom disease, also known as crazy disease, broom disease, bird nest disease, is a serious disease Paulownia production. More than ten provinces and cities in Henan and other cities have varying degrees of distribution, with serious damage to the North China Plain. In recent years, in our province there have also occurred, some places, increasingly serious. According to the initial investigation of eleven counties (cities) in three districts of Tianshui, Qingyang and Pingliang, all the patients had different degrees of morbidity. Thirty-three towns, units and social teams in Tianshui, Huixian, Xihe, Tianshui, Zhangchuan, Qin’an, Zhangxian and Wushan counties in Tianshui Prefecture planted 5-7-year-old Lankao Tong 2754, of which, light sick strain (one third of the susceptible branches