RSB 1 is a grape rootstock obtained from the crossbreeding of Vitis riparia Michaux and Vitis berlandieri Planchon in 1896 in France. It is characterized by a strong root system that penetrates deeply into the soil, ensuring drought resistance and good adaptation to calcareous soils with up to 40% total carbonates and up to 20% exchangeable lime. Young shoot leaves have a weak bronze tint, while mature large dark-green leaves with a wedge-shaped format and slightly twisted lamina create an attractive appearance for the vine.
RSB 1 rootstock differs in high resistance to chlorosis and root phylloxera, as well as good tolerance to temporary spring flooding and summer drought. It imparts greater growth vigor to scions, especially in the initial stage of bush development, which allows for rapid accumulation of wood volume within a season. Cuttings of this rootstock root satisfactorily and graft onto most grape varieties.
A vineyard planted on RSB 1 demonstrates a large annual growth – from 50 to 90 thousand m²/hectare. The vine possesses a powerful structure, thick canes, and long internodes, which ensures good affinity to various grape varieties. Thanks to resistance to fungal diseases and leaf phylloxera, this rootstock is a reliable choice for growing in moderately fertile soils with high carbonate content.
