Influence of the grapevine leafroll associated virus (GLRaV-1) and grapevine fleck virus (GFkV) on the grape and wine production of the variety Gamay | Effets du virus 1 associé à l'enroulement (GLRaV-1) et du virus de la marbrure (GFkV) sur le comportement agronomique et la qualité des vins de Gamay
2012
Spring, J.-L. | Reynard, J.-S. | Viret, O. | Maigre, D. | Gugerli, P. | Brugger, J.-L., Station de recherche Agroscope Changins-Waedenswil ACW, Pully (Switzerland)
An agronomical trial was conducted at the Research station Agroscope Changins- Wädenswil in Nyon (VD) in order to evaluate the effects of infections with GLRaV-1 or/and GFkV on the grape and wine production. In a ten-year study (2001_2010), effects of virus infection were measured on the main parameters of vines, musts and wine. The effects of GLRaV-1 with or without GFkV co-infection were a reduction of vine vigour and production potential of the vine, a decrease of the leaf mineral content (nitrogen, calcium and magnesium) but an increase of the leaf potassium content. No difference was observed between vines infected by GFkV alone and healthy ones. On the other hand, the presence of GFkV in mixed infections with GLRaV-1 contributed to increase the negative effects associated with GLRaV-1: reduction of the sugar and nitrogen contents in musts and reduction of the wine quality measured by sensory analysis.
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Este registro bibliográfico ha sido proporcionado por Agroscope Reckenholz-Tänikon Research Station