Crouchen B
Name of vine variety in France
Crouchen
Origin
This vine variety is originally from the South-west of France (Pyrenees, Landes).
Synonymy
In France, this variety is officially called "Cruchen B" with regard to plant progagating material.
Regulations
In France, Crouchen B is officially listed in the "Catalogue of vine varieties".
Use
Wine vine variety
Evolution of area under vines in France
2008 2016
ha 1 0.4
Description
Identification signs include:
- the tips of the young shoots have a very dense cover of flat-lying hairs,
- the young leaves are green with bronze patches,
- the adult leaves are orbicular, dark green, 5 or 7-lobed with an open or slightly opened petiolar sinus, U-shaped base; lateral sinuses frequently with a tooth at the base, short to medium teeth with convex or straight sides; sparse to medium anthocynanic pigmentation  of veins; bubbled, rugged or revolute leaf blade; underside with sparse cover of upright and flat-lying hairs,
-short elliptical-shaped berries
Genetic profile
Microsatellite VVS2 VVMD5 VVMD7 VVMD27 VRZAG62 VRZAG79 VVMD25 VVMD28 VVMD32
Allel 1 131 223 239 178 188 246 240 227 239
Allel 2 149 229 257 186 194 260 248 257 239
Phenology
Bud burst: 7 days after Chasselas. Grape maturity: period II, 3 weeks after Chasselas
Suitability for cultivation and agronomic production
This vine variety is adapted to well exposed, gravel or sandy terroirs
Sensitivity to diseases and pests
Crouchen B is sensitive to powdery mildew.
Technological potential
The clusters are medium sized and the berries small and crunchy. When the grapes are harvested with good maturity Crouchen B produces dry, elegant and rather aromatic white wine.
Clonal selection in France
The two approved Crouchen B clones carry the numbers 1019 and 1020. Two conservatory plots include over 90 clones, located in the Landes area and the Irouleguy vineyards (Pyrenees-Atlantiques), ensuring the conservation of this vine variety.
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. - Cépages et vignobles de France, tome 2. P. Galet, 1990, Ed. Dehan, Montpellier.
- Ampélographie. P. Viala et V. Vermorel, 1902-1910, Ed. Masson, 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
1019  Pyrénées-Atlantiques  ENTAV    medium  medium to high  
 1994  Sud-Ouest  low to medium    low to medium  
         distinctive wines of the vine variety
1020  Pyrénées-Atlantiques  ENTAV    medium  medium  
 1994  Sud-Ouest  medium    medium  
         distinctive wines of the vine variety