A legendary wine, the great Sweet or syrupy white wines of Bordeaux are known throughout the world. It is in this category that we find the famous Sauternes and the famous Château d'Yquem considered as one of the best white wines in the world. Why such a reputation? It is partly due to the development of a microscopic fungus, Botrytis cinerea, which causes, when conditions are favourable, the famous noble rot. But in this region, it is not enough for the Grapes to be ripe to be harvested.
Over-ripening and the development of botrytis cinerea are sought after. This fungus attacks both the interior and the skin of the grape, which wrinkles and takes on a brownish-purple colour. This leads to a concentration of sugars, an evaporation of water, as well as numerous modifications that will transform the grape Juice into a real "liqueur" whose richness can exceed 400 g of sugar per litre. However, the Sauternes region does not have a monopoly on botrytis cinerea, which is also found in the regions: Dordogne, Loire Valley, the sweet wines of Alsace, etc.
Colombard is one of the oldest grape varieties in the Charentes. This golden white grape variety is a cross between Chenin and Gouais. The young leaves of colombard are yellow with bronze patches. The adult leaves may be three-lobed or whole, depending on the variety. Its branches are cottony. The bunches of this variety are thick and cylindrical. Its elliptical berries are medium-sized. They change color until they ripen, ranging from greenish white to golden yellow. Colombard is associated with an average budding. It is particularly susceptible to leafhoppers, grape worms, mites, mildew, powdery mildew and gray mold. It is also sensitive to water stress, but is not very sensitive to wind. It ripens late in the second half of the year. There are a dozen approved clones of Colombard, the best known of which are 608, 607 and 606. This variety produces a full-bodied, fine white wine. Aromas of lime, nectarine, boxwood, citrus and exotic fruits are released.
