Petit Courbu B
Name of vine variety in France
Petit Courbu
Origin
Petit Courbu B is a native vine variety from the Pyrénées region.
Synonymy
Regulations
In France, Petit Courbu B is officially listed in the "Catalogue of vine varieties".

This variety is likewise listed in the Catalogue of Spain.
Use
Wine vine variety
Evolution of area under vines in France
1958 1968 1979 1988 1998 2008 2016
ha 10 12 20 40 77 66 65
Description
Identification signs include:
- the tip of the young shoot has a very heavy coat of flat-lying hairs,
- the young leaves are reddish with bronze patches,
- the shoots have tendrils which are entwined and attached to one another,
- adult leaves are moderate size, pentagonal shaped, 3 or 5 lobes with a slightly open petiolar sinus or with slightly overlapping lobes, upper lateral sinuses are deep and open, very short teeth compared to width at base, convex or straight sides; heavy anthocyanin coloration of veins; slightly revolute leaf blade, strongly bubbled, almost cupped and the underside with a moderate coat of upright hairs and a moderate to heavy coat of flat-lying hairs, 
- round-shaped berries.
Genetic profile
Microsatellite VVS2 VVMD5 VVMD7 VVMD27 VRZAG62 VRZAG79 VVMD25 VVMD28 VVMD32
Allel 1 149 223 239 186 188 248 248 216 239
Allel 2 149 234 262 188 194 252 266 257 271
Phenology
Bud burst: 6 days after Chasselas.
Grape variety: period III, 4 and 1/2 weeks after Chasselas.
Suitability for cultivation and agronomic production
This vine variety is not very productive and is generally long pruned.
Sensitivity to diseases and pests
Petit Courbu B is fairly susceptible to grey rot.
Technological potential
Grape clusters are small and the berries are very small. Petit Courbu B produces fine, quality, aromatic wines of great finesse.
Clonal selection in France
The 3 approved Petit Courbu B clones carry the numbers 813, 885 and 1062. Two conservatories with around 190 clones have been set up; one in the Gers in 1997, and the other in the Pyrénées-Atlantiques in 1999.
Bibliographic references
- Catalogue des variétés et clones de vigne cultivés en France. Collectif, 2007, Ed. IFV, Le Grau-du-Roi.
- Documentation interne du Domaine de Vassal. 1949-2011, INRA, Marseillan-plage.
- Dictionnaire encyclopédique des cépages. P. Galet, 2000, Ed. Hachette, Paris.
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
813  Pyrénées-Atlantiques  INRA  medium  medium  medium  
 1985  Sud-Ouest  medium    medium  
 0.51 ha        distinctive wines of the vine variety
885  Pyrénées-Atlantiques  INRA    medium to high  medium  
 1986  Sud-Ouest      medium  
 0.35 ha        distinctive wines of the vine variety
Clone with longer internodes
1062  Pyrénées-Atlantiques  CA 64 - ENTAV  medium  medium  medium to high  
 2001  Sud-Ouest  low to medium    medium  
         balanced, fatty and concentrated wines