CONGENIALITY DEGREE BETWEEN FLAME SEEDLESS CV. AND SOME NEMATODE RESISTANT GRAPEVINE ROOTSTOCKS

Abstract

Three independent experiments were carried out during 2012 and 2013 seasons to evaluate three Nematode resistant rootstocks of grapevine and three grafting techniques in two different dates for the Flame seedless grapevine cv. propagation. The obtained results show that Freedom rootstock surpass the other two tested ones (Harmony and Salt creek). In addition, Tongue grafting technique is better than Cleft grafting. Result also revealed that summer grafting using Chip budding (Yema budding) gain the highest graft take (survival %) but has the lowest compatibility degree (F.C.C.). The considered parameters for the evaluation of rootstock type, grafting method and grafting date were: graft take (survival %), congeniality degree (compatibility as F.C.C.),vegetative growth of scion and its leaf minerals content,chemical composition of rootstock at the time of grafting. However, data proved that bench grafting with Tongue method on Feb.15th using Freedom rootstock is the recommended technique for Flame seedless grapevine cv. propagation.