Effects of callusing on vegetative development and graft take ratio of grapevine bench grafts

This master thesis study was conducted in the nursery plots of Sun Fidan Inc. located at Bayramiç, Çanakkale. Vegetative development and graft take ratio of bench grafted cuttings of Razakı, Victoria and Alphonse Lavallée on 5 BB rootstock were determined under the conditions whether a callusing room was used. In the study, following parameters were examined; graft take ratio in the field, first class grafting percentage, callusing level, matured primer shoot length, green primer shoot length, number of nodes and summer lateral shoots on the primer shoot, mean length of lateral shoots, diameter between nodes of 2.-3., 5.-6. and 9.-10., number and length of secondary-tertiary shoots, number of nodes and lateral shoots on secondary-tertiary shoots, thickness of rootstock and graft point, number of main and lateral roots, leaf total weight, petiole weight, leaf area, contents of cholorophyll a, b and total chlorophyll. At the end of this study, it was determined that when nurseries are in deficit of callusing room and time, grafted cuttings could be directly planted in the field following two paraffination applications and positive result could be obtained. Similar studies should be carried out with different rootstock × cultivar combinations.Keywords: callusing room, callus, nursery graft take ratio, graft paraffination.