6种药剂防治中海拔地区烟草赤星病的药效研究

Study on Pesticide Effect of Six Chemicals on Alternaria alternate in Middle Elevation Areas

[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0.1 g)效果最好,产量和产值较大,其次是戴琼脂帽Ⅰ(含10%宝利安0.3 g)和戴琼脂帽Ⅲ(含40%菌核净0.6 g)。且各施药处理对烟株农艺性状影响不大。[结论]烟株打顶后戴含有10%宝利安0.1 g、10%宝利安0.3 g或含40%菌核净0.6 g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。

[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.