Affects vines when air temperatures are high. Very high daytime temperatures, of more than 40°C/104°F, cause the vine to "shut down", or virtually cease photosynthesis, as the enzymes responsible can no longer work. High temperatures also lead to water stress, especially when accompained by bright sunshine, low humidity, and strong, dry winds.
Essential element for healthy vine growth. A deficiency of zinc affects the plant's ability to synthesize the hormones auxins, deficiency in which results in a failure of the shoots to grow normally.
Winemaking process with the aim of clarification and stabilization of a wine whereby a fining agent, one of a range of special materials, is added to coagulate or adsorb and precipitate quickly the colloids suspended in it.
Means literally "late harvest" and in France is restricted to Alsace, where strict regulations cover ist production, even if too many producers are meeting only the bare minima.
The most prestigious wine estate in Burgundy, based in Vosne-Romanée. The Domaine, as it is frequently called, is co-owned by the de Villaine and Leroy families and produces only Grand Cru wines.
Or Le Montrachet, the most famous Grand Cru white burgundy, the apogee of the Chardonnay grape produced from a single vineyard in the Côte de Beaune district of the Côte d'Or.
One of the most important wine rivers, linking a range of vineyards as dissimilar as those of Châteauneuf-du Pape in southern France, sparkling Seyssel, and Fendant du Valais in Switzerland.
Often abbreviated to MLF or malo, is the conversion of stronger malic acid anturally present in new wine into lactic acid (which has lower acidity) and carbon dioxide.
System of fractional blending used most commonly in Jerez for maintaining the consistency of a style of Sherry which takes ist name from those barrels closest to the suelo, or floor, from which the final blend was customarily drawn.
Translates directly from French as a wine that is naturally sweet. Vins doux naturels are made by mutage, by artificially arresting the conversion of grape sugar to alcohol by adding spirit before fermentation is complete.
Adapted by the champagne industry for wines made without (much) added sweetening or dosage. The upper limit for the resiudual sugar of a brut champagne has been reduced from 15 to 12 g/l.
Term in common parlance, but not in federal law, in the US that suggests loosely that the wine came entirely from grapes farmed on the winery's own property.
Occasionally madeirization, is the process by which a wine is made to taste like Madeira, involving mild oxidation over a long period and, usually, heat.