烤烟气侯斑点病(Weather fleck)是烟株叶片受空气中的臭氧(O_3)毒害引起。该病随烤烟的种植,发病逐渐加重,为烤烟旺长期的主要病害。尤是1990年推广“G28”品种,发病面积大、受害重,重病因病株率100％,病叶率40％以上,严重影响烤烟品质,已成为烤烟防病夺高产增效益急待解决的技术难题。为此,我们对其发病规律和防治措施进行了调查,结果如次。 Flue-cured tobacco fleck is caused by poisoning of leaf tobacco leaves with ozone (O 3) in the air. The disease with the cultivation of flue-cured tobacco, the incidence gradually increased, the main long-term disease for the flue-cured tobacco. Especially in 1990 to promote the “G28” varieties, the incidence of a large area, the victim of severe, severe disease due to plant rate of 100%, diseased leaves rate of 40% or more, seriously affecting the quality of flue-cured tobacco, tobacco has become a disease technical challenge. To this end, we conducted a survey on its incidence and prevention and treatment measures, with the same result.