Distribution of Races ofXanthomonas vesicatoriaPathogenic on Pepper

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Abstract
Cultures of X. vesicatoria isolated from naturally infected peppers and tomatoes [Lycopersicon esculentum] in Argentina, Australia, Brazil, El Salvador, Guadeloupe, Hungary, India, Italy, New Zealand and the USA were identified to pathotype. All cultures pathogenic on pepper were categorized as pepper strain, race 1, except 1 culture (identified as pepper strain, race 2) from Guadeloupe and cultures collected in Florida [USA] that represented both pepper pathotypes. Race 2 has been widely distributed on pepper in Florida during the past 19 yr, which, with the reported occurrence of the same race in Brazil, serves to confuse etiologic information concerning the original pepper pathotype. Sources of resistance to both pepper pathotypes were identified and the problems of adding these characters to horticulturally desirable types defined.