烟草黑胫病是烟草(Nicotiana tabacum)生产上的毁灭性病害之一。经验证明,以抗病品种为中心的综合防治,能够有效地控制烟草黑胫病的为害。在实施综合防治计划中,应当注意的重要问题之一就是烟草黑胫病菌的变异性。因为,在烟草的生产过程中,新的高毒力菌系或新的生理小种的出现,往往使一批抗病品种(尤其是那些具有单基因控制的垂直抗性的品种)“丧失”抗病性而成为感病品种,结果造成病害大流行。于是人们不得不针对这些新出 Tobacco shank is one of the devastating diseases in the production of Nicotiana tabacum. Experience shows that the integrated prevention and control centering on resistant varieties can effectively control tobacco black shank disease. One of the important issues to be aware of in implementing a comprehensive prevention and control program is the variability of tobacco blackleg. Because the emergence of new strains of high virulence or new race in tobacco production tends to “lose” a group of disease-resistant varieties, especially those with vertical resistance controlled by a single gene, Disease resistance and become susceptible varieties, resulting in disease pandemic. So people have to deal with these new out