THE INFLUENCE OF CLIMATIC FACTORS ON DOWNY MILDEW IN TWO VINEYARDS FROM FRANCE AND ROMANIA
DOI:
https://doi.org/10.51258/RJH.2023.16Keywords:
Plasmopara viticola, air temperature, rainfall, degree of attack, grapevine diseaseAbstract
The objective of this study was to evaluate the influence of climate variability from the last two years, namely 2021-2022, on the development of the pathogen Plasmopara viticola in two vineyards renowned for the quality of their wines, Murfatlar (Romania) and Val de Loire (France). The study was carried out on four grapevine cultivars: 'Sauvignon blanc' and 'Cabernet sauvignon', authorized for the production of CDO Murfatlar wines; and Cot and Chenin, authorized for the production of CDO Touraine wines. The results regarding the appearance and development of the disease on leaves and bunches in different grapevine development stages, on the two variants of the experiments (treated and untreated) highlighted different levels of attack depending on the distribution of precipitation and the evolution of average air temperatures during the vegetation period. The excess rainfall regime in 2021 of 339.3 mm in Murfatlar and 351.8 mm in Val de Loire, and the air temperatures of 20-25°C generated optimal conditions for the spread of disease on the leaves in the untreated variant, reaching a maximum of 48.3% in Murfatlar and 9.5% in Val de Loire during veraison. The disease also spread to the bunches, reaching a maximum of 86.2% in Murfatlar, endangering almost completely the production of grapes. In the case of the variant where phytosanitary treatments were applied, the degree of attack was a maximum of 4%. In 2022, against the background of quantitatively reduced precipitation compared to 2021, with 64.15% in Murfatlar and 45.01% in Val de Loire, the first oil spots were identified in the untreated variant during BBCH 55 (the emergence of inflorescences), having an insignificant spread, reaching a maximum of 8.9% in the cluster compaction phenophase (BBCH 77).
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Altimira F., De La Barra N. and Rebufel P. (2019). Potential biological control of the pupal stage of the European grapevine moth Lobesia botrana by the entomopathogenic fungus Beauveria pseudobassiana in the winter season in Chile. BMC Res Notes 12, 548
Bois B., Zito S. and Calonnec A. (2017). Climate vs grapevine pests and diseases worldwide: the first results of a global survey. OENO one, 51(2), 133-139.
Buffara C. R. S., Angelotti F., Vieira R. A., Bogo A., Tessmann, D. J. and Bem B. P. D. (2014). Elaboration and validation of a diagrammatic scale to assess downy mildew severity in grapevine. Ciência Rural, 44, 1384-1391.
Caffi T., Rossi V. and Bugiani R. (2010). Evaluation of a warning system for controlling primary infections of grapevine downy mildew. Plant disease, 94(6), 709-716.
Gessler C., Pertot I. and Perazzolli M. (2011). Plasmopara viticola: a review of knowledge on downy mildew of grapevine and effective disease management. Phytopathologia Mediterranea, 50(1), 3-44.
Kennelly M. M., Gadoury D. M., Wilcox W. F., Magarey,P. A. and Seem, R. C. (2007). Primary infection, lesion productivity, and survival of sporangia in the grapevine downy mildew pathogen Plasmopara viticola. Phytopathology, 97(4), 512-522.
Lorenz D. H., Eichhorn K. W., Bleiholder H., Klose R., Meier U. and Weber E. (1995). Growth Stages of the Grapevine: Phenological growth stages of the grapevine (Vitis vinifera L. ssp. vinifera). Codes and descriptions according to the extended BBCH scale. Australian Journal of Grape and Wine Research, 1(2), 100-103.
Mahlein A. K. (2016). Plant disease detection by imaging sensors–parallels and specific demands for precision agriculture and plant phenotyping. Plant disease, 100(2), 241-251.
Massi F., Torriani,S. F., Borghi,L. and Toffolatti S. L. (2021). Fungicide resistance evolution and detection in plant pathogens: Plasmopara viticola as a case study. Microorganisms, 9(1), 119.
Mezei I., Lukić M., Berbakov L., Pavković B. and Radovanović B. (2022). Grapevine Downy Mildew Warning System Based on NB-IoT and Energy Harvesting Technology. Electronics, 11(3), 356.
Rumbolz J., Wirtz, S., Kassemeyer H. H., Guggenheim R., Schäfer E. and Büche, C. (2002). Sporulation of Plasmopara viticola: differentiation and light regulation. Plant Biology, 4(03), 413-422.
Tomoiagă, L (2013). Ghidul fitosanitar al viticultorului. Academic Press, Cluj Napoca, pp. 143.
Tulbure I. and Haidarl I. (2013). Importanţa evaluării factorilor meteorologici în plantaţia viticolă. Noosfera. Revista ştiinţifică de educaţie, spiritualitate şi cultură ecologică, (9), 119-126.
Zia-Khan S., Kleb M., Merkt N., Schock S. and Müller, J. (2022). Application of infrared imaging for early detection of Downy Mildew (Plasmopara viticola) in grapevine. Agriculture, 12(5), 617.
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