The performance of 'Sauvignon Blanc' on five grapevine rootstocks in a Marlborough vineyard
Grapevine rootstocks are known to influence canopy development, particularly the timing of budbreak and canopy vigour, yield components and fruit composition at harvest. The selection of rootstock/scion combinations that best suit the nuances of the environment will assist the grower in achieving production goals. In 1991 a trial was planted to evaluate the performance of 'Sauvignon Blanc' on five rootstocks (Teleki 5C, 101-14 Millardet et de Grasset, Kober 125 AA, 3309 Couderc, & Schwarzmann) in the Rapaura region of Marlborough, New Zealand. Measurements of vine development over a 16-year period showed that rootstock affected early shoot growth, canopy vigour and yield of LSQUOSauvignon BlancRSQUO. For younger vines, seasonal effects on yield per bud across rootstocks dominated rootstock effects, and as vines matured, yield differences among rootstocks became more apparent. Rootstocks also influenced berry size and juice composition at harvest, specifically soluble solids content and pH. Schwarzmann had the highest berry weight and the lowest soluble solids content of all the rootstocks. In the final seven years of the study, 3309 Couderc had the highest juice pH of all the rootstocks. Trends in the performance of scions on different rootstocks only became apparent over time, highlighting the importance of evaluating mature vines.
Neal, S.M., Friend, A.P., Trought, M.C.T. and McLachlan, A.R.G. (2016). The performance of 'Sauvignon Blanc' on five grapevine rootstocks in a Marlborough vineyard. Acta Hortic. 1115, 147-155
age, fruit quality, phenology, vigour, Vitis vinifera, yield