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Characterization of Xanthomonas campestris pv. vesicatoria from Capsicum annuum L. in Italy. ROBERTO BUONAURIO, Istituto di Patologia Vegetale, Universita di Perugia, Borgo XX Giugno, 74, 06100, Perugia, Italy. VITTORIO MARIO STRAVATO, Peto Italiana, Centro Ricerche di Latina, 04010, Borgo Sabotino (LT), Italy; and MARCO SCORTICHINI, Istituto Sperimentale per la Patologia Vegetale, Via C.G. Bertero, 22, 00156, Roma, Italy. Plant Dis. 78: 296-299. Accepted for publication 24 November 1993. Copyright 1994 The American Phytopathological Society 296. DOI: 10.1094/PD-78-0296.

In the summer of 1991 and 1992, 38 strains of Xanthomonas campestris pv. vesicatoria were isolated from pepper leaves and fruits in a number of central (Latium, Marche, Tuscany, and Umbria) and southern (Apulia) Italian regions. Race and copper and streptomycin sensitivity of the bacterial strains were determined. Races 1, 2, and 3 were found to be present on pepper. Of the strains tested, 39, 16, and 45% belonged to races I, 2, and 3, respectively. Of all strains tested, 45% were resistant to copper sulfate (200 μg/ ml), while none were resistant to streptomycin sulfate (100 μg/ml). All of race 2 and 73% of race 1 strains were resistant to copper, while all race 3 strains were copper sensitive.