See under sugaring.
Is it even allowed to "sugar" wine - that is, to add sugar in any form? Well - this question is not so easy to answer and there are probably very few topics in winemaking that are so often misunderstood. It should not be understood to mean disguised winemakers sneaking into their wine cellars at night and emptying unauthorised bags of sugar into the tanks and barrels.
Possible sugaring depends on the type of wine, the wine quality level, the stage of vinification and the type of sugar...
Serious sources on the internet are rare - and Wine lexicon from wein.plus is one such source. When researching for my articles, I regularly consult the wein.plus encyclopaedia. There I get reliable and detailed information.
Thomas Götz
Weinberater, Weinblogger und Journalist; Schwendi