喷施枯草芽孢杆菌对生态烟主要病害防治的影响

Effects of Bacillus subtilis on Main Diseases of Organic Tobacco

[目的]了解枯草芽孢杆菌对生态烟主要病害防治的影响,为其推广应用提供参考。[方法]通过裂区试验研究了喷施枯草芽孢杆菌可湿粉剂对生态烟病害防治的影响。[结果]喷施100亿/g枯草芽孢杆菌与对照区相比,在大田前期可使烟株降低发病率7.41%,大田后期降低7.86%,并使烟株具有一定的普通花叶病抗性;可使中部叶、上部叶叶面积分别增大106.25、35.38cm2;可使上等烟比例达到86.41%,较对照高出12.02个百分点,均价为28.1元/kg,较对照高出2.8元/kg,单叶重为8.05g/片,较对照高出0.54g/片,优势非常明显;可使烤后烟"油分"变多,"身份"变厚,提高生态烟的产值量。[结论]为微生物在生态烟病害防治中的推广运用提供了理论依据。

[ Objective ] Effects of Bacillus subtilis on main diseases of organic tobacco were studied to provide reference for the application in practical production. [ Method ] The effect of spraying Bacillus subtilis wet table powder on ecological tobacco diseases was studied by split plot experiment. [ Result] The 10 billion/g Bacillus subtilis could reduce the incidence rate of tobacco by 7.41% at first, which reduced 7.86% in later period, compared with the CK during field growth phase. It also could make the tobacco plants with resistance to TMV. It could make the areas of middle leaf and upper leaf increased by 106.25 and 35.38 cm2 respectively, make high class leaf ration reached 86.41%, 12.02 percentage points higher than the control, and make average price fold to 28.1 yuan/kg, 2.8 yuan/kg higher than the control. The weight per leaf was 8.05 g, which was 0.54 g more than control. It could make the oil and leaf thickness of flue-cured tobacco more reasonable. There- fore, microbial inoculums improved the production value of ecological tobacco whose advantage was very obvious. [ Conclusion ] The results provide theoretical basis for the application of microorganism in diseases controlling of organic tobacco.