苜蓿黄萎病(Verticilliumalbo-atrum)是中国严禁传入的检疫性有害生物。但是随着中国西部地区多年大量从疫情发生的美国和加拿大引种苜蓿,苜蓿黄萎病传入我国的危险性很大。2001年,我国口岸检疫部门就从来自加拿大萨斯克彻温省新田种子公司的40t苜蓿种子中检出了苜蓿黄萎病,并 Verticillium tuberosum is a quarantine pest that is strictly forbidden to be introduced into China. However, with the introduction of alfalfa in large quantities from the United States and Canada where epidemic occurred in western China for many years, it is very dangerous to introduce alfalfa verticillaria into China. In 2001, China’s quarantine authorities at ports detected alfalfa wilt disease from 40t of alfalfa seeds from Xintian Seeds Company, Saskatchewan, Canada, and