一、发病情况石家庄地区的棉花枯萎病发病历史已经相当长,早在五十年代就有零星发病。从全区来看,自发病以来总的情况是发展趋势。发病历史大体可分三个阶段。第一阶段,从1956年—1958年。当时仅在正定县的兆通公社西庄屯大队、高邑县的河北村大队、藁城县北马、岗上大队等三个县的部分大队零星发生黄萎病。是由原河北省农业科学研究所引入石短5号时传入此病。第二阶级,1958 First, the incidence of Shijiazhuang cotton blight disease history has been quite long, as early as the fifties have sporadic disease. From the region point of view, since the onset of the situation is the general trend. The history of the disease can be divided into three stages. The first phase, from 1956 to 1958. At that time, only part of the brigades of the Xizhuangtun Brigade of the Zhaotong Commune in Zhengding County, Hebei Village Brigade in Gaoyi County, Northern Horse in Tancheng County, and Gangchu Brigade in other counties had sporadic occurrence of Verticillium wilt. Is introduced by the original Hebei Institute of Agricultural Sciences short stone on the 5th introduced into the disease. Second class, 1958