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The future of phosphite as a fungicide to control the soilborne plant pathogen Phytophthora cinnamomi in natural ecosystems

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Abstract

The issues that influence the application of the fungicide phosphite (phosphonate) to natural plant communities affected by Phytophthora cinnamomi Rands are complex. Research has shown significant protective effects that are valued in the preservation of rare and endangered plant species and communities. However, phosphite does have other effects that include phytotoxicity, growth abnormalities, reduced reproductive capacity and large difference in levels of P. cinnamomi control between plant species. Clearly a balanced approach needs to be adopted when using phosphite for the management of P. cinnamomi in natural ecosystems. It is necessary to take into account the beneficial and detrimental effects of phosphite and the possible loss of plant species if the fungicide is not used. Traditional forms of P. cinnamomi management are also outlined to highlight their continued importance in disease management, irrespective of whether phosphite is used or not.

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Authors and Affiliations

  1. School of Biological Sciences and Biotechnology, Division of Science and Engineering, Murdoch University, 6150, Murdoch, Western Australia, Australia

    G. E. St.J. Hardy

  2. Department of Conservation and Land Management, 120 Albany Highway, 6330, Albany, Western Australia, Australia

    S. Barrett

  3. Department of Conservation and Land Management, CALMScience, 50 Hayman Road, 6152, Como, Western Australia, Australia

    B. L. Shearer

Authors
  1. G. E. St.J. Hardy
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  2. S. Barrett
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  3. B. L. Shearer
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Correspondence to G. E. St.J. Hardy.

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Hardy, G.E.S., Barrett, S. & Shearer, B.L. The future of phosphite as a fungicide to control the soilborne plant pathogen Phytophthora cinnamomi in natural ecosystems. Australasian Plant Pathology 30, 133–139 (2001). https://doi.org/10.1071/AP01012

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