ISHS Acta Horticulturae 754: International Workshop on Advances in Grapevine and Wine Research
A RAPID PROCESS TO REPLACE A VARIETY IN GRAPEVINE |
| Authors: | M. Policarpo, D. Tomasi, D. Porro, R. Zorer, M. Stefanini |
| Keywords: | bud, scion, grafting, budding, Vitis vinifera |
| Abstract:
Rapid changing in consumer trends has stimulated new interest for variety-replacement techniques in established vineyards. Top-working is the process of changing the top of an established vine from one cultivar to another in one year, by budding or grafting. Budding techniques as Chip-bud or T-bud are very common; not much known is the grafting wood-on-green scion (W-green). The aim of this work was to compare W-green performance to Chip-bud and T-bud. The top-working was performed by skilled workers on a mature vineyard of the Istituto Agrario di San Michele a/Adige with scion and bud of ‘Chardonnay’ clone 95. Three treatments were imposed on ‘Cabernet Sauvignon’ clone R5 grafted on 101-14 Mgt rootstock, and on ‘Syrah’ clone 100 and ‘Merlot’ clone 181 both grafted on 3309 C rootstock. The sprouting yield of grafting type × interstock interaction of two-way ANOVA was significant and Chip-bud/interstocks resulted significantly higher than T-bud and W-green/interstocks with a mean per treatment of 92.0%, 85.9% and 78.6% respectively. Fertility, production, bunch weight, soluble solid, titratable acidity and pH for the three treatments at harvest were not significantly different. It was concluded that Chip-bud performed as the best top-working process. | |
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