黑胫病、青枯病是当前烟草发生多而,普遍的病害。正确区别这两种病害是搞好烟草病害防治,发展烟叶生产的一个重要方面。一、黑胫病为真菌性病害,主要在烤烟大田生育中后期发生危害;青枯病是细菌性病害,在烤烟整个生育过程中均可发生。二、黑胫病病部在烟茎基部,呈块状,使茎基部变为黑色;青枯病发生在烟茎杆中上部,呈条状或斑点状沿茎杆一侧 Black shank and bacterial wilt are the common and frequent diseases of tobacco. The correct distinction between these two diseases is to improve the prevention and treatment of tobacco disease, the development of tobacco production is an important aspect. First, the black shank disease is a fungal disease, mainly in the mid-late stage of flue-cured tobacco crop damage; bacterial wilt bacterial disease, the entire reproductive process can occur in flue-cured tobacco. Second, the black shank disease department in the tobacco stem base, was massive, so that the base of the stem turned black; bacterial wilt occurred in the upper part of the tobacco stems, were strip or spot along the side of the stem