A BACTERIOPHAGE THAT ATTACKS NUMEROUS PHYTOPATHOGENIC XANTHOMONAS SPECIES

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Abstract
This paper reports the isolation of a lytic phage that attacks in vitro numerous phytopathogenic Xanthomonas species, including X. campestris (Pammel) Dowson, the cause of black rot disease of crucifers. Although 'one-step' growth experiments suggested an average burst size of ca. four for this phage-host system, 'single burst' experiments indicated a burst size of ca. one hundred phage particles per bacterium. The particles have typical phage morphology, as determined by electron microscopy. This phage gave satisfactory results when used in the rapid plaque count test for detection of phage-sensitive bacteria in plant materials.