Information about aromas
| Aroma profile for Geosmin | | Geosmin generates a musty flavor that flaws wine. It has a more vegetal note than the corked aromas of TCA, and is variously described as causing aromas of turnips, wet earth, or rot. It was a major problem in Beaujolais in the 2000 and 2002 vintages, and also has been a sporadic problem in Bordeaux, Burgundy, and the Loire since 2000. It is generated when both botrytis fungus and the bacterial mold Penicillium expansum (commonly found on vegetables about to go rotten) infect grapes together, Geosmin degrades in an infected wine, so may disappear before bottling in the case of wines given extended maturation in barriques, but is a serious problem for wines intended to be bottled and consumed young. It can be removed by filtering with oils, milk, or charcoal; these procedures have been illegal but have been permitted since the 2004 vintage to deal with geosmin contamination. Meticulous sorting is need to avoid the problem, since sensitivity is such that 2-5% of contaminated clusters can ruin a wine. |
Encyclopedia entries that mention Geosmin
Activated charcoal
Albumin
Bentonite
Casein
Fining
Gelatin
Isinglass
Kieselsol
Polysaccharides
Polyvinylpolypyrrolidone
Tannin | Options for searching aromas and compounds database | | View lists of aromas by selecting a type in the box and clicking the icon | | Select an aroma by name directly from the box and click the icon. | | Select a compound by name directly from the box and click the icon. | When an aroma or compound is displayed,
choose the next or last entry in the alphabetical list preceding the entry. | | Any of these terms can also be entered directly in the encyclopedia. |
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Geranium
