ISHS Acta Horticulturae 652: I International Symposium on Grapevine Growing, Commerce and Research
ROOTSTOCKS (VITIS SPP) PERFORMANCE TRIALS IN SLOVENIA |
| Authors: | P. Lavrencic, B. Koruza, F. Cus, Z. Korosec |
| Keywords: | Vitis, rootstock, vigour, Ravaz index, root: shoot ratio, phylloxera |
| Abstract:
Developments of quality grapevine production in Slovenia have recently required a lot of changes in winegrowing practice, especially in training systems and planting density. For that purpose several preliminary experiments have been done with different rootstock/scion combinations in vineyards and in the nursery. We were looking for rootstocks with weak or moderate vigour, good phylloxera resistance (Daktulosphaira vitifoliae FITCH) and good performance in drought conditions. In four field nursery experiments the rootstock '420 A MGt' showed the weakest root and shoot growth, while the rootstock 'Paulsen 1103' mostly performed distinctive growth of roots and it advanced further shoot growth. According to root weight the rootstocks 'Kober 5BB' and 'Teleki SO 4' in some cases came close to 'Paulsen 1103', but they did not always enable the transfer of roots vigorous growth to shoots. Two experiments in vineyard confirmed strong vegetative growth hypothesis of 'Paulsen 1103'. In one case rootstock 'Fercal' came close to 'Paulsen 1103' and in other case 'Kober 5BB' and 'Ruggeri 140' were close, too. At the nursery experiment in 2001, we found significant high number of phylloxera nodosities on one-year grafts of cv. 'Rebula' grafted on rootstock '3309 C'. | |
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