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Monitoring activities on fungicide resistance in Botrytis cinerea carried out in vineyards in North-West Italy in 2018

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Abstract

A monitoring was conducted in 35 commercial vineyards located in Piedmont (North-West Italy) in September 2018 to test the sensitivity of Botrytis cinerea populations to the fungicides that were commonly used in the past and at present: benzimidazoles, dicarboximides, anilinopyrimidines, phenylpyrroles, hydroxyanilides and SDHI fungicides. Sensitivity was tested by evaluating the spore germination on a medium amended with a discriminatory concentration of the different tested botryticides. Conidial suspensions were prepared from infected, randomly sampled bunches and used for the tests. In comparison with the years 2008–2014, the following trend was recorded: benzimidazole resistance was quite stable and was found in about 50% of the vineyards involved in the monitoring; dicarboximide resistance had disappeared in the tested samples, while the frequency of resistance to anilinopyrimidines had increased; the resistance to fenhexamid had decreased; in the case of boscalid, the presence of resistance was quite stable; no resistance to phenylpyrroles was found, although the high discriminatory dose used for fludioxonil cannot exclude the presence in the tested vineyards of low levels of resistance to this fungicide, typical of multidrug-resistant strains.

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Authors and Affiliations

  1. Center of Competence for the Innovation in the Agro-environmental Sector (AGROINNOVA), University of Torino, Largo Braccini 2, 10095, Grugliasco, TO, Italy

    Domenico Bertetti, Matteo Monchiero, Angelo Garibaldi & Maria Lodovica Gullino

  2. Dipartimento di Scienze Agrarie, Forestali e Alimentari (DI.S.A.F.A.), University of Torino, Largo Braccini 2, 10095, Grugliasco, TO, Italy

    Maria Lodovica Gullino

Authors
  1. Domenico Bertetti
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  2. Matteo Monchiero
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  3. Angelo Garibaldi
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  4. Maria Lodovica Gullino
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Correspondence to Domenico Bertetti.

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Bertetti, D., Monchiero, M., Garibaldi, A. et al. Monitoring activities on fungicide resistance in Botrytis cinerea carried out in vineyards in North-West Italy in 2018. J Plant Dis Prot 127, 123–127 (2020). https://doi.org/10.1007/s41348-019-00263-3

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  • DOI: https://doi.org/10.1007/s41348-019-00263-3

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