ripe ready to harvest semillon white grape on sauternes vineyards in barsac village affected by botrytis cinerea noble rot, making

barsac botrytis cinerea brommes fargues french sweet wine graves great preignac sauternes semillon acidity affected aging agriculture aperitif appelation bordeaux classification cultivation dessert france fresh fruit flavor fungus grape growth handpicked harvest mature muscadelle noble rot plant process raisin region row sauvignon blanc soils sweetness unique vineyard white winery