烟草霜霉病(Peronospora tabacina Adam)是烟草作物的一种毁灭性病害,蔓延很广,遍及世界许多国家。鉴于我国无烟草霜霉病分布,因此,杜绝此病的传入,保护烟草生产,对来自疫区的烟叶实施检疫很有必要。烟草霜霉病传病的主要来源是分生孢子和卵孢子,但分生孢子与卵孢子比较,其抗逆能力差,寿命短,烟叶经晒干、贮藏、航运、加工等过程,随烟叶携带霜霉病分生孢子传病的可能性少。关于卵孢子,尽管萌发的具体情况不甚清楚,传播流行所起作用认 Tobacco downy mildew (Peronospora tabacina Adam) is a devastating disease in tobacco crops that spread widely across many countries in the world. In view of the distribution of tobacco-free downy mildew in our country, it is necessary to stop the introduction of this disease and to protect the production of tobacco and to implement the quarantine of tobacco leaves from affected areas. Tobacco downy mildew disease is the main source of conidia and oospores, but the conidia and oospores, their resilience is poor, short life expectancy, the tobacco leaves after drying, storage, shipping, processing and other processes, with tobacco There is less likelihood of carrying downy mildew conidia. About oospores, although the germination of the specific situation is not clear, the epidemic played a role recognized