Bacterial diseases of tomato in the Czech and Slovak Republics and lack of streptomycin resistance among copper-tolerant bacterial strains

Abstract Surveys of foliar and fruit bacterial diseases of tomato were conducted in 1992 and 1993 in the Czech and Slovak Republics. Pseudomonas syringae pv. tomato , causal agent of bacterial speck, was isolated most frequently. Pseudomonas syringae pv. tomato accounted for 86% of the strains recovered from clinic samples at the Research Institute for Crop Production in Prague in 1992. All of the strains recovered from diseased samples collected in Moravia, Czech Republic in 1993 and 90% of those from Slovakia in 1993 were also P. s. pv. tomato . The bacterial spot pathogen Xanthomonas campestris pv. vesicatoria was recovered infrequently in both years. No strains of P. s. pv. tomato or X. c. pv. vesicatoria were resistant to 200 μg ml −1 streptomycin. Copper tolerance was prevalent; frequency of copper tolerance of P. s. pv. tomato strains was greater than 75% in both 1992 and 1993.