Glera
ActiveVitis vinifera L. · Common grape vine
INCONNU (FR)
Variety traits
Vitis vinifera L.
A key indicator of crop quality, reflecting the concentration of glucose and fructose in berry juice, which determines harvest timing and the potential of future wine.
In the reference 126 varieties crop Common grape vine, where this is mentioned in the description.
The sugar content of grape berries varies between 12–30% depending on the variety, climatic conditions, and agricultural practices. For high-quality wines, target values are considered to be in the 20–24% range, while values below 18–20% are often insufficient for complete fermentation without additional adjustment.
Monitoring sugar levels, along with acidity and pH indicators, allows the agronomist to precisely determine the optimal harvest start date. The rate of sugar accumulation depends on insolation and thermal conditions, as well as agrotechnical factors such as water management and the level of crop load per vine.
General information about the subject — on the page Sugar content.
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
INCONNU (FR)
Vitis vinifera L. · Common grape vine
GIDEON JACOBUS NICOLAAS COETZEE
Vitis vinifera L. · Common grape vine
Shachar Karniel
Vitis vinifera L. · Common grape vine
Vitis vinifera L. · Common grape vine
Timothy P Sheehan, Sheehan Genetics Australia Pty Ltd
Vitis vinifera L. · Common grape vine
Prof. Dr.Dr.h.c. Gerhardt Alleweldt
Vitis vinifera L. · Common grape vine
Stefano Somma
Vitis vinifera L. · Common grape vine
INCONNU (FR)
Vitis vinifera L. · Common grape vine
Sarl Bourguet et Fils
Vitis vinifera L. · Common grape vine
José Ignacio Fernández Fernández/Leonor Ruiz García/María Rocío Gil Muñoz/ Celia Martínez Mora/Juan Antonio Bleda Sánchez/Adrián Martínez Cutillas
Vitis vinifera L. · Common grape vine
José Ignacio Fernández Fernández/Leonor Ruiz García/María Rocío Gil Muñoz/ Celia Martínez Mora/Juan Antonio Bleda Sánchez/Adrián Martínez Cutillas
Vitis vinifera L. · Common grape vine
Johannes Zimmermann
Vitis vinifera L. · Common grape vine
Staatliches Weinbauinstitut Freiburg
Vitis vinifera L. · Common grape vine
Phil Ellis, Arc Infruitec Nietvoorbij
Vitis vinifera L. · Common grape vine
Shachar Karniel
Vitis vinifera L. · Common grape vine
Petar Dimitrov, Yordan K. Ivanov, Kolyu I. Katerov, Ivan H. Dimitrov
Vitis vinifera L. · Common grape vine
GARGIULO ANGELO
Vitis vinifera L. · Common grape vine
James J. Luby^^^Peter Hemstad
Vitis vinifera L. · Common grape vine
Marco Stefanini Fondazione Edmund Mach (FEM-CRI)
Vitis vinifera L. · Common grape vine
Dimitar Babrikov, Venelin Roychev, Agricultural University - Plovdiv (BG)
Vitis vinifera L. · Common grape vine
Land Baden-Wurttemberg, Germany
Vitis vinifera L. · Common grape vine
Stefano Somma
Vitis vinifera L. · Common grape vine
InnoVitis GmbH
Vitis vinifera L. · Common grape vine
Yordan K. Ivanov, Vasil Y. Valchev, Georgi S. Petkov, Boris A. Muzyichenko (RU), Arif M. Aliev (RU), Ivan A. Kostrikin (RU)