Name of vine variety in France (and common name)
Breeder and year of obtention
Léo Laliman, 1870
Genetic origin
Although its exact origin is unknown, this variety is derived from the crossbreeding involving Vitis labrusca and Vitis riparia.
Evolution of areas under rootstock nurseries
1945 1955 1965 1975 1985 1995 2005 2015
Rank 1 12 15 17 18 20 20 19
ha 8 32 34 41 19 8 5 4
Estimated surface area of French vineyards grafted with this rootstock and the main areas of use
7 000 ha. Rhône-Alpes (Beaujolais), Aquitaine
Ampelographic description
Identification signs include:
- the tip of the Young shoot is half-open to closed with a heavy coat of flat-lying hairs and anthocyanin coloration on the edges,
- the Young leaves are yellow and the underside with a heavy coat of flat-lying hairs on the leaf blade and a slight coat on the veins,
- the vine shoots have a ribbed contour and the presence of 3 consecutive or more tendrils.
- adult leaves are large, whole, upturned with a slightly open lyre-shaped petiolar sinus, a thick leaf blade, teeth with straight sides and the underside with a slight to moderate coat of flat-lying and upright hairs,
- female flowers with bulging flower buds,
- moderate to large size berries, round-shaped with foxy aromas and a bluish black skin,
- dark Brown and ribbed vine shoots.
Genetic profile
Allel 1 122 263 235 234 202 250 234 224 245
Allel 2 133 263 251 234 202 256 234 235 245
Resistance to soil parasites
Low to moderate degree of tolerance to radicicolae phylloxera. For this reason, Vialla should only be used under unfavorable conditions for this pest. It likewise has just moderate resistance to Meloidogyne arenaria nématodes.
Adapt to environment
Vialla is extremely susceptible to chlorosis and it resists only up to 4% active limestone and a CPI of 2. It is likewise susceptible to drought and must be used under conditions with sufficient water input. this root stock is well adapted to acid and decalcified soils: sandy, granite or fairly deep argilo-siliceous soils.
Interaction with grafts and production objectives
Vialla generally displays good compatibility and good affinity with grafts as the diameter of the stem is comparable to grafts. Vialla vigor is fairly strong but induced fertility is limited. This root stock influences early vegetative cycles and tends to produce less acidic products. Vialla gives good results with Gamay N.
Aptitudes for plant propagation
This root stock is a low wood producer (15 000 to 50 000 m/ha). Debudding and cuttings are difficult due to substantial number of tendrils. Vialla displays good aptititude for propagation by cuttings and grafting wih occasional substantial calluses.
Resistance to aerial parasites
Fairly high resistance to gallicolae phylloxera with good resistance to downy mildew.
Clonal selection in France
The 5 approved Vialla clones carry the numbers 116, 258, 266, 267 and 760.