Qualitative and economic influence of severe topping on goblet-pruning
Abstract
In Beaujolais, for some years severe topping was developed on goblet-pruning, in order to reduce working time and sensitiveness to grey rot. But canopy reduction may reduce grape quality and reserve accumulation in perennial parts of vine. This study takes place in Morgon and compares traditional tied goblet and severe topping goblet, no tied, to verify these different aspects. Results highlight economic interest of severe topping (-30% on fastening, topping and harvest time), without negative effect on wine quality, in spite of vigor increase, as long as canopy height reduction remains below 40%. Beyond, maturity is delayed and reserves decrease. Wine sensory quality is then reduced. Qualitative earning can be expected for years with strong pressure of grey rot. The reduction of must nitrogen content, noticed with severe topping, is to be taken into account in winemaking, to avoid fermentation problems and their negative repercussions.
Issue: GiESCO 2013
Type: Poster
Authors
1 Institut Français de la Vigne et du Vin, 210 bd Vermorel, 69400 Villefranche-sur-Saône, France
2 SICAREX Beaujolais, 210 bd Vermorel, 69400 Villefranche-sur-Saône, France
3 Institut Français de la Vigne et du Vin, Château de Mons, 32100 Caussens
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Keywords
training system, production cost, grey rot, reserves, leaf area