Antibacterial activity of Sophora flavescens extracts against pepper blight (Fusarium oxysporum).

[Objective] The paper was to explore the antibacterial activity of S.flavescens extracts against pepper blight.[Methods] Growth rate method and suspend-drop method were used to measure the inhibition effect of different solvents and concentrations of S.flavescens extracts on F.oxysporum.[Result] The inhibition rate of crude extracts of S.flavescens extracted by ethyl acetate and acetone was significantly higher than that of ethanol.With the increasing concentration of ethyl acetate crude extracts of S.flavescens,its inhibition effect against mycelial growth and spore germination of F.oxysporum significantly increased.When the mass concentration was 40 g/L,its inhibition rates against mycelial growth and spore germination of F.oxysporum were 94.48% and 89.01%,respectively.[Conclusion] The active substance contained in S.flavescens roots had strong inhibition activity against pepper blight,which had the potential value for further research and development.