Evaluation of antibacterial properties of alcohol and water extracts of propolis on Ralstonia solanacearum

Potato brown rot (the causal agent Ralstonia solanacearum) is one of the important and dangerous bacterial diseases. Due to its wide distribution and broad host range and in soil of different regions through irrigation water or latent infected tubers. It is generally difficult to control the damage of of this bacterium. This disease is widely distributed in most part of Iran and which reduce the quality and quantity of potato. This research was conducted to survey antibacterial activity of propolis on Ralstonia solanacerum. After propolis collection from different parts of Kurdistan province and propolis extraction and water extraction, Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) activity for bacterial strains were determined. Data analysis was performed using the SPSS software programme and comparison of means was done with Duncan test at 5% level. Use of alcoholic solvent (96% ethanol and dimethyl sulfoxide) resulted in a greater mean diameter of growth inhibitory zone in comparison to water extract (p