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鉴于云南烟区大田期烟草病害混合发生日趋严重,单一农药品种防效较差的状况,作者选用云南烟区几个常用农药品种,根据田间病害组成相和农药理化性质,提出了烟草配方施药方案,并进行了田间小区试验和同田对比试验。小区试验结果表明:909—B1混配剂对烟草赤星病平均防效为71.1％,对烟草蛙眼病、炭疽病、角斑病等叶斑类病害的平均防效为81.3％,对烟草野火病平均防效为80.9％。同田对比试验与小区试验结果基本相同,表明配方施药对真菌、细菌病害有较好的防治效果,尤其是909—B1明显优于其他供试农药品种。
In view of the increasingly serious tobacco disease mixing during the field in Yunnan tobacco growing season and the poor control effect of single pesticide variety, the author chose several commonly used pesticide varieties in Yunnan tobacco growing area. According to the composition of the field disease and the physicochemical properties of the pesticide, Program, and conducted a field plot test and field trials. The plot test results showed that the average control effect of 909-B1 compound on tobacco brown spot disease was 71.1%, the average control effect on leaf spot diseases such as frog eye disease, anthracnose and angular leaf disease was 81.3% The average control effect is 80.9%. The results of the same field experiment and plot test were basically the same, which showed that the formula application had better control effects on fungi and bacterial diseases. Especially, 909-B1 was obviously better than other tested pesticides.