Susceptibility to downy mildew (Plasmopara viticola) of different Vitis varieties |
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| Institution: | 1. The French Associates Institute for Agriculture and Biotechnology of Drylands, The Jacob Blaustein Institute for Desert Research, Ben-Gurion University of the Negev, Sede Boqer, Israel;2. Department of Biochemistry and Molecular Biology, University of Nevada, Reno, NV 9557, USA;1. UMR ECOSYS, AgroParisTech, INRA, Université Paris-Saclay, 78850, Thiverval-Grignon, France;2. Domaine des Chauvets, 26110 Vinsobres, France;1. Department of Agricultural and Environmental Sciences-DISAA, Università degli Studi di Milano, via Celoria 2, Milano 20133, Italy;2. Applied Intelligent Systems–AIS Lab, Computer Science Department, Università degli Studi di Milano, via Celoria 26, Milano 20133, Italy;1. Department of Sustainable Agro-ecosystems and Bioresources, Research and Innovation Centre, Fondazione Edmund Mach (FEM), S. Michele all’Adige, Italy;2. Dipartimento di Scienze delle Produzioni Agroalimentari e dell’Ambiente, Università degli Studi di Firenze, Firenze, Italy;3. DIPROVES, Department of Sustainable Crop Production, Università Cattolica del Sacro Cuore, Piacenza, Italy;1. Department of Agricultural Economics and Economics, Montana State University, Bozeman, MT 59715, USA;2. Department of Agricultural and Resource Economics, University of California, Davis, 1 Shields Avenue, Davis, CA 95616, USA |
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| Abstract: | The susceptibility of different varieties of Vitis vinifera and other Vitis species to downy mildew (caused by Plasmopara viticola) in field, greenhouse and laboratory tests was compared over a period of three years. Different degrees of susceptibility were detected. The most susceptible V. vinifera varieties were ‘Treixadura’ and ‘Albariño; ‘Cabernet Sauvignon’, ‘Mencía’ and ‘Chasselas Doré’ were the least susceptible. The non-vinifera varieties showed no symptoms of downy mildew in the field. Surprisingly, in laboratory and greenhouse tests, the rootstock 110-R was much more susceptible to infection than S04. No relationship was seen between susceptibility and berry colour, or the time of sprouting or fruit ripening. Neither was any correlation seen between susceptibility and the condition of being a traditional or introduced variety. Better knowledge of the susceptibility to downy mildew of different varieties would allow for growers and breeders to select those that are more resistant. |
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| Keywords: | Disease susceptibility Downy mildew Rootstock Varieties |
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