Courbu B
Name of vine variety in France
Courbu is a native variety from the Pyrenees vineyards. This variety does not correspond to the white form of Courbu noir. It is a distinct variety.
In France, this variety can officially be called "Gros Courbu" regarding plant propagation material. In Spain, Courbu can officially be designated as "Hondarrabi Zuri".
In France, Courbu is officially listed in the "Catalogue of vine varieties" on the A list and classified. This variety is also listed in the catalogue of Spain.
Wine grape variety.
Evolution of area under vines in France
1958 1968 1988 2000 2008 2018
ha 295 142 86 48 44 27
The identification is based on:
- the red and very bronzed young leaves,
- the large adult leaves, with three or five lobes, shallow lateral sinuses, a closed petiole sinus with overlapping lobes, short teeth compared to their width at the base with straight or convex sides, a very blistered, twisted or revolute leaf blade, undulate near the petiole sinus, and on the lower side of the leaves, a low density of erect and prostate hairs,
- the round-shaped or obloid berries, that are greenish yellow in color or slightly pink when ripe.
Genetic profile
Allel 1 131 223 243 182 188 252 248 233 239
Allel 2 149 236 247 188 204 252 248 235 271
Bud burst: 7 days after Chasselas.
Grape maturity: mid-season, 3 weeks and a half to 4 weeks after Chasselas.
Suitability for cultivation and agronomic production
This variety is sensitive to the wind. Courbu must be trained and pruned long. It is best to graft onto rootstock with low to moderate vigor.
Sensitivity to diseases and pests
Apart from grey rot, this variety does not seem to have any particular susceptibilities.
Technological potential
The bunches are small and the berries are very small. This variety produces high sugar content musts which are moderately acidic. Courbu can be used to make fine sweet wines or dry wines.
Clonal selection in France
The three certified Courbu clones carry the numbers 726, 727 and 812. A conservatory of 80 or so clones is planted in plots located in Irouleguy and Jurançon (French department of Pyrénées-Atlantiques).
Bibliographic references
- Catalogue des variétés et clones de vigne cultivés en France. Collectif, 2007, Ed. IFV, Le Grau-du-Roi, France.
- Documentary collections of the Centre de Ressources Biologiques de la Vigne de Vassal-Montpellier, INRAE - Montpellier SupAgro, Marseillan, France.
- Dictionnaire encyclopédique des cépages et de leurs synonymes. P. Galet, 2015, Ed. Libre&Solidaire, France.
- Traité général de viticulture, Ampélographie. P. Viala and V. Vermorel, 1901-1909, Ed. Masson, Paris, France.
Description of clones approved in France
Identity and availability Agronomic data Technical data
Clone number Origin Selection Fertility Production level Sugar content Potential color
Year approved Agronomic references Weight of grape clusters Vigor Total acidity Tannic structure
Growing surface area Size of berries Sensitivity to Botrytis Aromatic intensity Oenological aptitudes
726  Pyrénées-Atlantiques  ENTAV        
 1980  Sud-Ouest        
Small distribution clone, conforms to vine variety characteristics
727  Pyrénées-Atlantiques  ENTAV        
 1980  Sud-Ouest        
Small distribution clone, conforms to vine variety characteristics
812  Pyrénées-Atlantiques  INRA      high  
 1985  Sud-Ouest        
Looser grape clusters