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Screw grafting

Introduction

Grafting is a cultivation practice that serves to promote the propagation of many plant species. Not all, in fact, propagate from the seed, for some, especially the most susceptible to diseases and external adversities, it may be necessary to resort to grafting, or the union of two parts of the plant that are similar or related to each other. There are many plants that need to be grafted, including fruit trees. While not quite tree-shaped, there is one plant that benefits enormously from grafting. We are talking about the vine, a woody plant formed by branchy shoots from which table and wine grapes are obtained. Many vine varieties propagate by seed, but they do not have the ability to resist some diseases to which they are particularly vulnerable, such as phylloxera. In grafted vines, however, it was noted that phylloxera has almost completely disappeared. Grafting of the vine therefore responds to a double requirement: to favor the propagation of the plant and to give life to a new species more resistant to adversity and diseases.

Screws to graft


In nature there are different varieties of vines and not all of them need to be grafted. In fact, grafting must be carried out only in vines born from seed, while those born from previous grafts do not need to be grafted. The wild vine needs to be grafted, from which the best known vine varieties, namely the European and the American ones, derive. Grafting must be carried out between similar species, under penalty not only of the failure of the graft, but also the death of the plant. The Canadian vine, a climbing plant grown only for ornamental purposes, should not be grafted. This screw should not be used as a graft holder either. Indeed, it would be a mistake to graft a European or American vine onto a Canadian vine.

Types of grafting

Different types of grafts can be practiced on the vine. Everything will depend on your experience and skill. The most common grafts for vines are split and bud grafting, but different variants of the aforementioned grafts can also be performed, such as splinter, flask, star, triangle, bridge and Majorcan grafting.

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The split grafting of the vine is practiced on adult plants, using one of the most vigorous branches of the rootstock, on which one or more scions will be applied, or branches with buds taken from the vine to be used as a graft (part to be grafted). The graft can be single-split or double-split. In the first case a cut will be made in the stumped part of a woody branch of the rootstock, in which only one scion will be inserted, in the second a cut will be made that will cross the entire diameter of the trunk of the rootstock, where two or more scions will be inserted on the sides . The slips are taken from the winter remains of pruning, an activity during which branches with buds are removed. Before grafting, it is necessary to check that the scions are healthy and in good condition and that they do not show any lesions or signs of disease or egg deposits by parasites. After checking, the scions should be treated with moist peat and sprayed with fungicide for precautionary purposes. During the period prior to grafting, the same scions should be kept in a paper bread bag and placed in a cool and dry place. The seal of the split graft must be guaranteed using adhesive paper or mastic. If the split is practiced on the younger shoots of the vine (herbaceous grafting) and to avoid the wind causing the branches to bend too much, it is possible to resort to tying the entire plant with laces. A variant of the split graft is the splinter graft, where the scion is inserted into a lateral wound of the rootstock. After checking, the scions should be treated with moist peat and sprayed with fungicide for precautionary purposes. During the period prior to grafting, the same scions should be kept in a paper bread bag and placed in a cool and dry place. The seal of the split graft must be guaranteed using adhesive paper or mastic. If the split is practiced on the younger shoots of the vine (herbaceous grafting) and to avoid the wind causing the branches to bend too much, it is possible to resort to tying the entire plant with laces. A variant of the split graft is the splinter graft, where the scion is inserted into a lateral wound of the rootstock. After checking, the scions should be treated with moist peat and sprayed with fungicide for precautionary purposes. During the period prior to grafting, the same scions should be kept in a paper bread bag and placed in a cool and dry place. The seal of the split graft must be guaranteed using adhesive paper or mastic. If the split is practiced on the younger shoots of the vine (herbaceous grafting) and to avoid the wind causing the branches to bend too much, it is possible to resort to tying the entire plant with laces. A variant of the split graft is the splinter graft, where the scion is inserted into a lateral wound of the rootstock. the same slips should be kept in a paper bag for bread and placed in a cool and dry place. The seal of the split graft must be guaranteed using adhesive paper or mastic. If the split is practiced on the younger shoots of the vine (herbaceous grafting) and to avoid the wind causing the branches to bend too much, it is possible to resort to tying the entire plant with laces. A variant of the split graft is the splinter graft, where the scion is inserted into a lateral wound of the rootstock. the same slips should be kept in a paper bag for bread and placed in a cool and dry place. The seal of the split graft must be guaranteed using adhesive paper or mastic. If the split is practiced on the younger shoots of the vine (herbaceous grafting) and to avoid the wind causing the branches to bend too much, it is possible to resort to tying the entire plant with laces. A variant of the split graft is the splinter graft, where the scion is inserted into a lateral wound of the rootstock. the entire plant can be tied with laces. A variant of the split graft is the splinter graft, where the scion is inserted into a lateral wound of the rootstock. the entire plant can be tied with laces. A variant of the split graft is the splinter graft, where the scion is inserted into a lateral wound of the rootstock.

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