Estudos de processos de enxertia de verão sobre oito variedades de porta-enxertos, em videira (Vitis sp)
Palavras-chave:
enxertia videira, método enxertia, borbulha escudagem, garfagem topo, porta-enxerto cavaloResumo
In order to determine the practicability of summer grafting of grapevines, the best grafting method and the best root-top combination, trials were carried out at the Federal University of Viçosa, Viçosa Minas Gerais, Brazil. The variety ‘Niagara Rosada' was used as the top with the followine varieties as root stocks: “IAC 572', ‘IAC 313, “Schwarzmann', ‘IAC 571-6', TAC 766', “Traviu', ‘Telek’ and ‘RR 101 —14’. Grafting methods tested were: a) budding by an inverted T, b) bud plate inserted in place of an identical piece of bark and c) cleft with stock and scion of the same diameter.
Root stocks were planted August 24, 1972. Grafting was done January 3 and 4, 1973, and plants were pulled up July 16 and 17, 1973.
The following conclusions were reached:
a) It is possible to graft grapevines during the summer.
b) The bud plate method was the best, with 93.75% «taking». Budding was the second best, with 82.50% success.
c) The grafted plants were ready for transplanting after ten months and 23 days.
d) The natural vigor of the root stocks did no alter the taking of the grafts.
e) The stocks ‘Schwarzmann’ and ‘RR 101 — 14’ gave the best nursery plants, and ‘Telek’ gave the poorest. However, the relationship of these observati- ons to later productivity of the plantas remains to be determined.
f) With the bud plate method, plants had the highest top shoot and root wei- ghts and graft stems of largest diameters.
Referências
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