Abstract
Pseudomonas solanacearum was isolated from Heliconia showing bacterial wilt in field-grown and imported plants. These isolates were compared with indigenous isolates from Strelitzia, Synedrella, Alpinia, Alexandra palm, tomato and sapote. They were characterised biochemically into biovars and pathogenically into races. Biovar 3 isolates were pathogenic on tomato but not on diploid nor triploid bananas. Only the Heliconia isolates were pathogenic on Heliconia psittacorum. Biovar 1 isolates from Helionia were very virulent on diploid and triploid bananas and H. psittacorum but not on tomato resembling pathogenic race 2, the cause of Moko disease in banana. On Kelman’s tetrazolium medium, biovar 1 isolates grew slower than biovar 3 isolates with white, circular, glossy colonies with red pigmented centre and clear fluidal edge, resembling the SFR insect-transmitted type described from Central America. The distribution, pathogenicity and origin of the tested isolates suggest that biovar 1 strains are of exotic origin.
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Diatloff, A., Akiew, E., Wood, B.A. et al. Characteristics of isolates of Pseudomonas solanacearum from Heliconia . Australasian Plant Pathology 21, 163–168 (1992). https://doi.org/10.1071/APP9920163
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DOI: https://doi.org/10.1071/APP9920163