经 1975～ 1993年的田间观察与有关文献资料考证 ,得出中国过去和现在没有烟草霜霉病(PeronosporatobacinaAdamandPeronosporanicotianaSpeg)的结论 ,对这个观点中、美等国同行专家已取得共识。还较系统介绍了烟草霜霉病的病症、病原菌及发病规律 ,并提出了该病的检验方法及控制方法 From 1975 to 1993 in the field observations and related literature research, come to China in the past and there is no tobacco downy mildew (PeronosporatobacinaAdamandPeronosporanicotianaSpeg) conclusion, this point of view, the United States and other countries have reached consensus experts. Also introduced the system of tobacco downy mildew disease, pathogens and pathogenesis, and put forward the test method of the disease and control methods