PROPAGATION OF 'GORDAL SEVILLANA' OLIVE BY GRAFTING ONTO ROOTED CUTTINGS OR SEEDLINGS UNDER PLASTIC-CLOSED FRAMES WITHOUT MIST
One-year-old 'Gordal Sevillana' olive trees obtained by whip-grafting onto 'Picual' rooted cuttings in closed rooting benches grew more than if own-rooting the stock or the scion. Whip- and cleft-grafting produced better sprouting than chip-budding 'Picual' rooted cuttings. Removal of the rootstock's apical part by cutting below the second node was even better with the cleft method. Four-five months after seed germination seedlings were of enough size (12 cm height, 1.5 cm internode length, 2.3 mm thickness at the first node) as for receiving cleft grafts. At each one of the year's months the sprouting percentage was greater at 60 than at 30 days after grafting if providing good shading in summer time. At the August and three later dates, removing the upper part of the stock also produced better results even at the first recording date. Three- and four-node budwood scions did not increase the number of sprouting buds per graft as a higher percentage sprouted in the two-node ones. This work shows that difficult-to-root olive cultivars can be propagated at any time of the year by cleft-grafting either clonal or sexual rootstocks by saving a lot of time if compared to the traditional nursery grafting system.
Sotomayor-León, E.M. and Caballero, J.M. (1994). PROPAGATION OF 'GORDAL SEVILLANA' OLIVE BY GRAFTING ONTO ROOTED CUTTINGS OR SEEDLINGS UNDER PLASTIC-CLOSED FRAMES WITHOUT MIST. Acta Hortic. 356, 39-42