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在我国对烟草气候斑病的主要病原物尚存在两种不同的见解。1993～1996年多次采用人工模拟的研究结果表明,SO_2和O_3对烟株叶片伤害症状存在较大的差异,O_3伤害形成的白斑型症状又与气候斑病田间一般症状相同,故烟草气候斑病确系O_3为主的大气污染所致。O_3引起烟草气候斑病的临界剂量为0.321～0.358μl/L·0.25h。
There are two different opinions about the main pathogen of tobacco climate leaf spot in our country. The artificial simulated results from 1993 to 1996 showed that SO_2 and O_3 had significant difference on the leaf injury symptoms of tobacco leaves. The white spot symptom of O_3 injury was the same as the general symptom of the field of leaf spot, so the tobacco climate spot Disease is caused by O_3-based air pollution. O_3 caused the tobacco climate spot disease critical dose of 0.321 ~ 0.358μl / L · 0.25h.