Variety traits

Vigor — Vitis berlandieri Planch. x Vitis riparia Michx.

Vitis berlandieri Planch. x Vitis riparia Michx.

The vigor of Vitis berlandieri x Vitis riparia hybrids is a decisive criterion for their use as rootstocks, influencing the development of the aerial part, ripening timing, and the productivity of grafted plants.

In the reference 9 varieties crop Vitis berlandieri Planch. x Vitis riparia Michx., where this is mentioned in the description.

Rootstocks in this group exhibit a range of vigor from moderate to very high, imparting developmental energy to the scion varieties. Excessive growth intensity on fertile soils can reduce crop quality due to over-vegetation, poor berry coloration, and delayed cane maturation; however, the correct selection of a scion-rootstock combination allows for effective regulation of the balance between growth and fruiting.

Evaluation of the vigor of these hybrids is conducted by measuring the biomass of pruned canes at the end of the season, determining the average length of annual shoots, and calculating the growth volume, which for the SO4 variety is approximately 0.17 m³ per vine. An ampelographic scale from 1 to 9 points is also used, taking into account the intensity of lateral shoot formation and shoot development.

Specific vigor indicators vary depending on the variety: Kober 5BB is classified as a very vigorous rootstock suitable for poor soils, Teleki 8B has above-average vigor, and SO4 is characterized as a moderate-vigor rootstock, most effective on rich calcareous soils.

General information about the subject — on the page Vigor.

Sources8

Varieties of Vitis berlandieri Planch. x Vitis riparia Michx. mentioned in the description

Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.