Epidemiology of IXanthomonas euvesicatoria/I in Tokat Province

This study was carried out to determine the life span of Xanthomonas euvesicatoria (Xeu) in seeds, soil and plant residues and the first inoculum source that cause the onset of the disease. The study was carried out in the province of Tokat. Rifampicin-resistant Xeu isolate was inoculated into soil, seeds and plant residues. As a result of the studies, it was determined that Xeu remained viable in inoculated seeds until the 220th day (7 months), and lived in the soil for 105 days in summer and 14 days in winter. In plant residues, it was determined that the the life span in summer period was 60 days at 0 cm depth, 30 days at 20 cm depth; 30 days at 0 cm depth and 15 days at 20 cm depth in that of winter period. According to the results of this study, it was determined that the Xeu did not survive for a long time in plant residues and soil in Tokat province and thus was not carried to the next year, on the other hand the seed was the most important source of inoculum.