Grafting with restistant rootstock
Make a diagonal incision about 1 4 deep, just into the cambium, one each on either side of the trunk near the base, to allow the vine to “This must be done before the graft is made, since there is a likelihood that the pressure from sap flow will push the graft out A fine toothed hand pruning saw is adequate for making these simple cuts.

Picture four illustrates a grafted vine with the cabernet visible as the darker wood above the graft union and the rootstock variety below.
Picture five shows the scion being taped Xavier uses a special 1 wide grafting tape to carefully, yet firmly tape the graft into place The tape can stay in place until it breaks down from weathering.
In other words, the grafting of vines is also carried out because the roots of one type of grape vine might be better suited for a particular type of soil, or they might be more disease resistant than another Or the grapes of a different varietal might be favored for making a preferred style of wine, so the grape vine is grafted onto suitable rootstock for a particular location or terroir.