Effects of Bacillus subtilis on Main Diseases of Organic Tobacco

[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 35.38cm2 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 8.05g,which was 0.54g more than control.It could make the oil and leaf thickness of flue-cured tobacco more reasonable.Therefore,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.