貴腐菌 (Noble Rot) is a type of fungus, scientifically known as Botrytis cinerea, that affects grapes under specific conditions. It thrives in humid environments, particularly in regions with morning fog and warm afternoons. This fungus causes the grapes to shrivel, concentrating their sugars and flavors, which is essential for producing sweet wines. The presence of 貴腐菌 is crucial in the production of renowned dessert wines, such as Sauternes from France and Tokaji from Hungary. These wines are celebrated for their rich, complex flavors and aromas, resulting from the unique interaction between the grapes and the fungus.