137 Bulgarian Journal of Agricultural Science, 27 (No 1) 2021, 137–146 An overview of the diversity of pathogens causing bacterial spot on tomato and pepper in Bulgaria Nevena Bogatzevska1*, Taca Vancheva-Ebben2, Katya Vasileva3, Yoana Kizheva2 and Penka Moncheva2* 1Agricultural Academy, Institute of Soil Science, Agrotechnologies and Plant Protection “N. Poushkarov”, 1331 Sofia, Bulgaria 2Sofia University “St. Kliment Ohridski”, 1164 Sofia, Bulgaria 3Agricultural Academy, Maritsa Vegetable Crops Research Institute, 4003 Plovdiv, Bulgaria *Corresponding author:
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[email protected] Abstract Bogatzevska, N., Vancheva-Ebben, T., Vasileva, K., Kizheva, Y. & Moncheva, P. (2021). An overview of the di- versity of pathogens causing bacterial spot on tomato and pepper in Bulgaria. Bulg. J. Agric. Sci., 27 (1), 137–146 Bacterial spot (BS) is a destructive disease affecting tomato and pepper plants. A wide diversity among the pathogens causing this disease makes them a serious threat for the tomato and pepper production worldwide, including Bulgaria, where the disease has become a major problem. To date in Bulgaria three species have been identified that infect tomato X.( vesicatoria, X. euves- icatoria and X. gardneri), and two that infect pepper (X. vesicatoria and X. euvesicatoria). Despite the research and published data, there is no general information about the BS agents on tomato and pepper in Bulgaria in respect to pathotypes, races, and the dynamics of pathogenic populations during the years. In this study we analyzed and summarized for the first time the data on the species, pathotype and race structure of the pathogenic population during the period 1999-2016. BS on tomato is caused by three species (X.