New atypical strains of Xanthomonas campestris pv. citri
It was reported at the 6th International Congress of Plant Pathology in Montreal that new atypical strains of Xanthomonas campestris pv. citri (EPPO A1 quarantine pest) were isolated from Mexican lime (Citrus aurantifolia) in Saudi Arabia, Oman and India. When inoculated on Mexican lime leaves, the pathogen produced symptoms similar to the pathotype A strains of X.c. pv. citri. If, however, inoculated on grapefruit, Eureka lemon, sour orange and Poncirus trifoliata the produced symptoms were different from those produced by the A strains. The atypical strains could be easily separated from the typical A strains by their serological properties and less readily by their metabolic fingerprinting.
Sources
Verniere, C.; Pruvost, O.; Civerolo, E.; Hartung, J.; Maestri, P. (1993) Characterization of new atypical strains of Xanthomonas campestris pv. citri.
Presentation at the 6th International Congress of Plant Pathology, Montreal, CA, 1993-07/08-27/06.