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The appearance of dicarboximide resistance in Alternaria alternats in passionfruit in south-east Queensland

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Abstract

Isolates of Alternaria alternata resistant (EC50=290) and sensitive (EC50≦2) to iprodione were recovered from lesions on passionfruit fruit. Cross resistance to procymi-done and vinclozolin was demonstrated. The resistant strains remained stable after five transfers in the absence of the fungicide and behaved similarly to the iprodione-sensitive strains when tested against mancozeb and copper sulphate. Both iprodione-resistant and iprodione-sensitive strains were pathogenic to detached fruit.

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Authors and Affiliations

  1. Plant Pathology Branch, Queensland Department of Primary Industries, Maroochy Horticultural Research Station, 4560, Nambour, Queensland

    D. G. Hutton

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  1. D. G. Hutton
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Hutton, D.G. The appearance of dicarboximide resistance in Alternaria alternats in passionfruit in south-east Queensland. Australasian Plant Pathology 17, 34–36 (1988). https://doi.org/10.1071/APP9880034

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  • DOI: https://doi.org/10.1071/APP9880034

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