Effect of temperature, humidity and pH of environment on survival rate of bacteria Clavibacter michiganensis ssp. sepedonicus

摘要

Clavibacter michiganensis ssp. sepedonicus (Cms) is a quarantine organism, and potato tubers infected with Cms must be utilized. Utilization of large amount of potatoes is problematic, therefore there is a need for appropriate methods of treatment, and one of the methods taken into consideration is composting. The aim of the study was to determine the survival of Cms in conditions similar to the composting process. Research results indicate that the most important factor for the survival of Cms is temperature: the higher, the shorter the survival time of the bacteria. The increase in moisture content is a factor that reduces the survival of bacteria in relation to bacteria grown in the same temperature. In the studied temperatures, the pH of the substrate is a secondary factor for the survival of the bacteria C. michiganensis ssp. sepedonicus.