34 Ecole de Montpellier
Name of vine variety in France (and common name)
34 Ecole de Montpellier (34 EM)
Breeder and year of obtention
Gustave Foëx, 1890
Genetic origin
This variety was derived from the crossbreeding of Vitis berlandieri cv. Ecole and Vitis riparia.
Evolution of areas under rootstock nurseries
1945 1955 1965 1975 1985 1995 2005 2015
Rank 23 19 23 24 27 25 25 23
ha 3 2 2 2 0.5 0.3 0.7 0.8
Estimated surface area of French vineyards grafted with this rootstock and the main areas of use
500 ha. Alsace, Champagne
Ampelographic description
Identification signs include:
- the tip of the young shoot is half-opened to closed with a moderate coat of flat-lying hairs,
- slightly bronze colored young leaves,
- the shoot has a slightly ribbed contour, a circular or slightly elliptical section,  red internodes or nodes on the dorsal side and a heavy coat of upright hairs on the nodes and internodes,
- adult leaves are wedge-shaped, revolute with an open U-shaped petiolar sinus, teeth with straight sides, low to moderate anthocyanin pigmentation of veins and the underside with a slight to moderate coat of upright hairs and the underside with a slight to moderate coat of upright hairs, 
- male flowers,
- the vine shoots are brownish gray, dull colored with a heavy coat of upright hairs on the nodes and internodes.
Genetic profile
Allel 1 133 238 231 248 191 254 248 239 267
Allel 2 141 261 251 266 208 256 266 243 267
Resistance to soil parasites
34 EM has a high degree of tolerance to radicicolae phylloxera. Its resistance to the nematodes Meloidogyne incognita is very good but is only moderate with regard to the nematodes Meloidogyne arenaria.
Adapt to environment
34 EM resists up to 20% of active limestone and to a CPI of 40. Its resistance to ferric chlorosis can be considered to be moderate to good.
Interaction with grafts and production objectives
34 EM has an influence on the earliness of the plant cycle which can be interesting for northern vineyards or for table grapes.
Aptitudes for plant propagation
Wood production is low to moderate (25 000 to 50 000 m/ha). 34 EM displays a moderate propagation by cuttings capacity and good grafting capacity.
Resistance to aerial parasites
Its sensitivity to gallicolae phylloxera is low to moderate and it displays high resistance to downy mildew.
Clonal selection in France
The 2 approved clones of 34 EM carry the numbers 1032 and 1033.