Variety traits
Vitis vinifera L.
A key indicator of berry quality, determined by the content of tartaric and malic acids, which influences harvest timing and the stability of future wine.
In the reference 507 varieties crop Common grape vine, where this is mentioned in the description.
To assess grape acidity, two complementary parameters are used: titratable acidity, which measures the total concentration of organic acids, and active acidity (pH), which characterizes the degree of hydrogen ion dissociation. Titratable acidity is typically measured in grams per liter expressed as tartaric acid.
Typical values for titratable acidity in grape must range from 4–12 g/l, with 6.0–8.0 g/l considered optimal for red varieties and 6.5–8.5 g/l for white ones. The optimal pH range for grapes is 3.0–3.6; values below 3.0 hinder fermentation, while values above 4.0 reduce stability.
Acidity is a dynamic indicator: during the ripening process, the acid level in berries decreases while sugar content increases. Monitoring the balance of these substances under various climatic conditions allows agronomists to determine the optimal harvest time, preventing excessive acidity or a "flat" taste in the berries.
General information about the subject — on the page Fruit acidity.
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Vitis vinifera L. · Common grape vine
Timothy P Sheehan, Sheehan Genetics Australia Pty Ltd
Vitis vinifera L. · Common grape vine
Bezotosna Mar'iana Ihorivna
Vitis vinifera L. · Common grape vine
LOMBARDI GENETICS (PTY) LTDA
Vitis vinifera L. · Common grape vine
United States of America as represented by the Secretary of Agriculture
Vitis vinifera L. · Common grape vine
NO DECLARADOS
Vitis vinifera L. · Common grape vine
David W. Cain, PhD.
Vitis vinifera L. · Common grape vine
Martinez Manuel Tornel,Espin Juan Carreno
Vitis vinifera L. · Common grape vine
Gabriele Di Gaspero^^^Michele Morgante^^^Simone Diego Castellarin^^^Guido Cipriani^^^Enrico Peterlunger^^^Raffaele Testolin
Vitis vinifera L. · Common grape vine
Terry A Bacon
Vitis vinifera L. · Common grape vine
NO DECLARADOS
Vitis vinifera L. · Common grape vine
Terry A Bacon
Vitis vinifera L. · Common grape vine
Terry A. Bacon,Terrence J. Frett
Vitis vinifera L. · Common grape vine
Vivai Cooperativi Rauscedo, I
Vitis vinifera L. · Common grape vine
Simone Diego Castellarin^^^Guido Cipriani^^^Michele Morgante^^^Enrico Peterlunger^^^Raffaele Testolin^^^Gabriele Di Gaspero
Vitis vinifera L. · Common grape vine
Terry A Bacon
Vitis vinifera L. · Common grape vine
MANUEL TORNEL MARTINEZ
Vitis vinifera L. · Common grape vine
Walker Michael Andrew / Tenscher Alan C. / Riaz Summaira / Romero Ninfa
Vitis vinifera L. · Common grape vine
Walker Michael Andrew / Tenscher Alan C. / Riaz Summaira / Romero Ninfa
Vitis vinifera L. · Common grape vine
Simone Diego Castellarin^^^Guido Cipriani^^^Michele Morgante^^^Enrico Peterlunger^^^Raffaele Testolin^^^Gabriele Di Gaspero
Vitis vinifera L. · Common grape vine
GIDEON JACOBUS NICOLAAS COETZEE
Vitis vinifera L. · Common grape vine
Vitis vinifera L. · Common grape vine
Simone Diego Castellarin^^^Guido Cipriani^^^Gabriele Di Gaspero^^^Michele Morgante^^^Enrico Peterlunger^^^Raffaele Testolin
Vitis vinifera L. · Common grape vine
Vitis vinifera L. · Common grape vine