为了指导棉花黄萎病的预防研究和抗病选育工作,有必要对其危害损失进行探讨。材料与方法1、病圃设置为单一黄萎病圃,发病较为均匀,平均发病率为85%左右。2、病情记载标准。1983年和1984年铃 In order to guide the prevention and control of cotton Verticillium wilt disease and its breeding, it is necessary to discuss its harm and loss. Materials and methods 1, nursery garden set up as a single vertebral wilt nursery, the incidence is more uniform, the average incidence of about 85%. 2, the condition records the standard. 1983 and 1984 bell