[ Objective ] The aim was to select the medicament what could effectively prevent and control the occurrence and damage of Alternaria alternate in middle elevation areas. [Method] Six different pesticide treatments and non-pesticide blank control were designed, moreover, the method of randomized block was adopted to carry out plot experiment. [ Result] Every pesticide treatment had certain inhibiting effect on the occurrence and damage of Alternaria alternate,especially for agar cap Ⅱ( including 10％ Bao Lee 0.1 g), the effects were best, moreover, acre yield and output value were larger, followed by agar cap Ⅰ( including 10％ Bao Lee 0.3 g)and agar cap Ⅲ( including 40％ dimethachlon 0.6 g).In addition, every pesticide treatment had little effect on tobacco agronomic traits. [ Conclusion ] After topping, tobacco plants containing agar cap with 10％ Bao Lee 0.1 g, 10％ Bao Lee 0.3 g or 40％ dimethachlon 0. 6 g could effectively prevent and control the occurrence and damage of Alternaria alternate, moreover, the yield could be improved, thus, the method can be popularized.%[目的]筛选能有效防治中海拔地区烟草赤星病病害发生及危害的药剂.[方法]设计6个不同施药处理与不施药空白对照,采用随机区组方法进行小区试验.[结果]各药剂处理均对赤星病的发生和危害有一定的抑制作用,以戴琼脂帽Ⅱ(含10%宝利安0.1g)效果最好,产量和产值较大,其次是戴琼脂帽Ⅰ(含10%宝利安0.3g)和戴琼脂帽Ⅲ(含40%菌核净0.6g).且各施药处理对烟株农艺性状影响不大.[结论]烟株打项后戴含有10%宝利安0.1 g、10%宝利安0.3 g或含40%菌核净0.6g的琼脂帽能有效抑制赤星病的发生和危害,提高收益,可进行一定面积的推广.
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