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Excised shoot assay to determine the pathogenicity of root-rotting Phytophthora species on kiwifruit

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Abstract

An excised shoot assay revealed that the pathogenicity of individual Phytophthora species towards kiwifruit (cv. Hayward) shoot tissue was identical to the pattern of virulence previously reported for infection of the root system. Comparable to the results of root infection studies, P. cryptogea and P. Cinnamomi were highly virulent towards shoot tissue whilst P. citricola, P. gonapodyides, P. sterile A and P. sterile B were moderately to weakly pathogenic, respectively. P. megasperma was not pathogenic towards the shoot tissue. The results suggest that the shoot assay may offer a rapid, reliable means of determining the pathogenicity of Phytophthora species on kiwifruit.

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Authors and Affiliations

  1. Department of Botany, University of Auckland, Private Bag, Auckland, New Zealand

    A. Stewart & A. M. McCarrison

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  1. A. Stewart
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  2. A. M. McCarrison
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Stewart, A., McCarrison, A.M. Excised shoot assay to determine the pathogenicity of root-rotting Phytophthora species on kiwifruit. Australasian Plant Pathology 20, 146–148 (1991). https://doi.org/10.1071/APP9910146

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  • DOI: https://doi.org/10.1071/APP9910146

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