Folle blanche B
Name of vine variety in France
Folle blanche
Origin
This vine variety from the west of France is undoubtedly originally from the Charentes region. Based on published genetic analyses, it probably descends from Gouais B.
Synonymy
No synonym is officially recognized for this variety in France.In the European Union, Folle blanche B can officially be called by other names: Matza Zuri (Spain), Saint-Emilion (Cyprus).
Regulations
In France, Folle Blanche B is officially listed in the "Catalogue of vine varieties".

This variety is likewsie listed in catalogues of other European Union member countries: Cyprus and Spain.
Use
Wine and eaux-de-vie vine variety.
Evolution of area under vines in France
1958 1968 1979 1988 1998 2008 2016
ha 15865 12104 4296 3566 2862 1979 989
Description
Identification signs include:
- thetips of the young shoot have a heavy coat of flat-lying hairs,
- adult leaves have 5 lobes with deep and open U-shaped lateral sinuses, closed petiolar sinus or with slightly overlapping lobes, short teeth compared to width at base with convex sides, slight to moderate pigmentation of veins, an upturned leaf blade and the underside with a slight coat of flat-lying hairs and a heavy coat of upright hairs,
- round-shaped berries.
Genetic profile
Microsatellite VVS2 VVMD5 VVMD7 VVMD27 VRZAG62 VRZAG79 VVMD25 VVMD28 VVMD32
Allel 1 131 223 239 178 196 244 238 245 239
Allel 2 149 232 239 186 196 252 248 257 271
Phenology
Bud burst: 4 days after Chasselas.
Grape maturity: period II, 3 and 1/2 to 4 weeks after Chasselas.
Suitability for cultivation and agronomic production
This vine variety is fertile and productive and grows upright which enables short pruning with limited training. Folle blanche B is fairly sensitive to spring frost due to its early bud burst.
Sensitivity to diseases and pests
This variety is very susceptible to grey rot (very compact grape clusters), black-rot and to mites. It is also somewhat susceptible to downy mildew and wood disease.
Technological potential
The grape clusters and berries are moderate in size. Folle blanche B wines have low alcohol level and are generally nervy and acid. In southern areas this acidity drops when completely ripe. When this variety is not very affected by grey rot, the wines produced can be used to make excellent eaux de vie. Folle blanche Balso has a good capacity for making base wine.
Clonal selection in France
The 11 approved  Folle blanche B clones carry the numbers 280, 281, 354, 558, 559, 560, 561, 562, 563, 1131 and 1132. A conservatory with over 180 clones was set up in the Nantes region  vineyards in 1993.
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
280  Loire-Atlantique  ENTAV  high  medium to high  medium  
 1973  Loire-Atlantique  medium      
 0.36 ha        lively wines for this vine variety type
Later maturity clone
281  Vendée  ENTAV  medium  medium  medium to high  
 1973  Loire-Atlantique  medium      
 0.27 ha        very distinctive wines produced from this grape variety
354  Non précisée  ENTAV        
 1975  Loire-Atlantique        
         
Small distribution clone
558  Non précisée  ENTAV        
 1978  Loire-Atlantique        
         
Small distribution clone
559  Loire-Atlantique  ENTAV  high  high  medium  
 1978  Loire-Atlantique  medium to high      
 0.38 ha        very distinctive wines produced from this grape variety
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
560  Non précisée  ENTAV        
 1978  Loire-Atlantique        
         
Small distribution clone
561  Non précisée  ENTAV        
 1978  Loire-Atlantique        
         
Small distribution clone
562  Non précisée  ENTAV        
 1978  Loire-Atlantique        
         
Small distribution clone
563  Loire-Atlantique  ENTAV  medium to high  high  low  
 1978  Loire-Atlantique  high      
 0.30 ha        distinctive wines of the vine variety
1131  Maine-et-Loire  IFV    medium  medium to high  
 2009  Val de Loire      medium to low  
     medium  medium to high  aromatic wines with a long finish
Clone appreciated for its moderate production level, its lower acidity along with the organoleptic quality of the wines produced
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
1132  Loire-Atlantique  IFV    medium  medium to high  
 2009  Val de Loire      medium to low  
     medium  high  aromatic and balanced wines with a long finish
Clone appreciated for its agronomic characteristics of wines produced