Currently, the bench grafting is the main technique used for grapevine propagation. In Brazil, since 2000 this technique has been used under commercial scale. However, several procedures of this grafting technique were adapted from knowledge originated in the North hemisphere, without regional research. In some steps of bench grafting the use of auxins is crucial for callus formation and rooting, which may highly affect the successful of grafting operation. On the other hand, considering that the healing process of grafted cuttings varies according to the rootstock used, the regional experimentation is necessary for rootstocks varieties available in the Brazilian viticulture. In this context, this study evaluated the effect of different grafting waxes (with or without auxin) and different rootstocks on grafted cuttings for a range of grapevine cultivars. The trials were conducted at Núcleo Tecnológico EPAMIG Uva e Vinho, in Caldas, State of Minas Gerais, using the technique of bench grafting where the grafts were stratified in water and planted in a nursery stock under field conditions. The grafting wax with auxin showed more efficient for grafting union whereas the use of indolebutyric acid for the rooting of grafted cuttings showed a negatively influence. There was a variation among the studied years on the average of healing rate of different rootstocks. However, the healing rate was in the range considered normal for this grafting technique. Only 420A rootstock did not show a good performance to be used as bench grafting in this studied region.
rooting; callus formation; indolebutyric acid; Vitis spp
