aerial view on sauternes village and vineyards, making of sweet dessert sauternes wines from semillon grapes af

barsac botrytis cinerea brommes fargues french sweet wine graves great preignac sauternes semillon agriculture appelation bordeaux chateau classification cultivation dessert domain france fungus grape growth handpicked harvest house mature muscadelle noble rot old plant process raisin region row sauvignon blanc soils sweetness unique vineyard white winery