Sauternes (wine) Château d'Yquem, can be very expensive, due largely to the very high cost of production. Barsac lies within Sauternes, and is entitled to use either name. Somewhat similar but less expensive and typically less-distinguished wines are produced in the neighboring regions of Monbazillac, Cérons, Loupiac and Cadillac. In the United States, there is a semi-generic label for sweet white dessert wines known as "sauterne" without the "s" at the end and uncapitalized. As in most of France, viticulture is believed to have been introduced into Aquitania by the Romans. The earliest evidence of sweet wine production, however, dates only to
Sauternes (wine) dry, the different temperatures from the two rivers meet to produce mist that descends upon the vineyards from evening to late morning. This condition promotes the development of the "Botrytis cinerea" fungus. By mid day, the warm sun will help dissipate the mist and dry the grapes to keep them from developing less favorable rot. The Sauternes wine region comprises five "communes"— Barsac, Sauternes, Bommes, Fargues and Preignac. While all five communes are permitted to use the name Sauternes, the Barsac region is also permitted to label their wines under the Barsac appellation. The Barsac region is located on the