Taste specificity of certain American vines and the wine made from it, which is mostly negative to European tastes (surprisingly, this sound is perceived as pleasant in Japan). Other names for Foxton are Fox Taste, Fox Taste, Cat Seeker, Skunkon and Bug Taste. The term also very often used Hybridton is actually misleading, since not all hybrids have this tone. The name Foxton was chosen after the similarity of the scent to a fox or the smell of fuchsine (feline urine), wet fox fur and animal feces. This is especially pronounced in the species Vitis labrusca (also fox or strawberry vine) and a little less in the species Vitis rotundifolia or their derivatives and crossbreds.
But there are other American vine species that have the flavor, albeit to a lesser extent. The main cause of foxtone was identified in 1921 as the substance 2-methylantranilic acid (methyl anthranilate). But she is not alone responsible, because in 1993 was recognized as a further cause 2-aminoacetophenone. Second is also the cause of the wine error UTA (untypical age tone). The content of these compounds increases continuously in berries with grape ripeness.
Always associated with this penetrating wine error is the sensory much more pleasant, but also wine-strange strawberry flavor / tone . The wine has a typical taste of strawberries (raspberries, hawthorn). 2,5-Dimethyl-4-hydroxy-2,3-dihydrofuran-3-one (furanol) was identified as the causative agent. While in the American vines and their immediate derivatives 2-Methylantranilsäure, so the Foxton, far outweighs, occurs in further backcrossings Europeans Vines This false note more and more in the background and the strawberry flavor makes more noticeable. An example of this interplay are the grape varieties Castor and Pollux that have a distinct strawberry note, but only a weak foxtone.
With more precise analysis methods, even in pure European varieties, all three substances mentioned above could be detected side by side in traces, but due to the low concentration, they had no sensory influence. Although foxtone and strawberry flavoring, according to the current state of knowledge, always appear in different intensities in grapes, they are considered to be two separate wine faults, It should therefore under no circumstances be subsumed under Foxton, which is the case in most specialized publications. Wines or wine-like drinks from Labruscasorten are Americano (Switzerland), fragolino (Italy) and Uhudler (Austria).
Source: recognize wine defects / Edmund Lemperle (Ulmer-Verlag)