Brettanomyces, wine fault so fashionable in the US that it is sometimes just called Brett. Wines affected by this spoilage yeast smell offputtingly mousey. Named after French statesman Jean Antoine Chaptal and usually strictly controlled. Chx Lafite, Latour, Mouton, Margaux and Haut-Brion. clarification, umbrella term for a host of processes designed to ensure wine is crystal clear, including fining , filtration and refrigeration. Just after flowering, an excessive proportion of the nascent berries fall off, often because of unsettled cold, wet weather.
Some varieties are more prone than others.
It may also strip out flavour if overdone. American and European parents fruit set - early summer phenomenon which immediately follows flowering. As soon as the vine flowers, a proportion of them are fertilized, or 'set', to become berries, and eventually grapes. The higher the proportion, the bigger the crop is likely to be. In a viticultural context, usually grafting a European fruiting vine on to a rootstock, often chosen for its resistance to phylloxera .