APPLE ROOTSTOCK TRIALS AT THE FACULTY OF HORTICULTURE, UHF BUDAPEST (PRELIMINARY REPORT)
With the aim of testing new apple rootstock selections in local Hungarian ecological conditions, an apple rootstock trial was planted in 1991 with 'Idared', 'Kovelit', 'Gloster', 'Lysgolden' and 'Jonagold' scions budded on 40 rootstocks from the M, MM, Budagovsky, P-, J-TE- and Ottawa series, as well as Jork 9, Alnarp 2, and Malling 9 clones. This paper presents the results of the first five years' growth and yield of these apple trees. Spacing was suited to the rootstock vigor described in the previous literature; for vigorous rootstocks 4.5 x 2.5m, semi-dwarfing 4.5 x 2m, dwarfing 4.5 x 1.5, and extremely dwarfing rootstocks 4.5 x 1m was used. Tree size and yield was measured every year, data were tabulated and statistically analyzed. The size of trees on the different rootstocks was similar to that shown by others in previous literature, except for some new rootstocks. Trees on Ottawa 3 and J-TE-F were dwarf, similar to Malling 9, but trees on J-TE-E were smaller than those of on Malling 9, while trees on J-TE-H were the largest in the group of dwarfing rootstocks. In comparison to the other dwarfing rootstocks, better yield efficiency could be achieved on the rootstocks Malling 9 Pajam 2 and Jork 9. In the local Hungarian conditions, rootstocks with a transitional growth vigor between dwarfing and semi-dwarfing groups like Jork 9 and J-TE-H might have some usefulness. Trees on Jork 9 are characterized by a good branching and fruiting ability. B 9 and B 57–491 showed good productivity and smooth graft unions. Semi-dwarf trees were produced on Malling 26, Malling-Merton 106 and Malling-Merton 111, where the best yield efficiency was shown by MM 111/A. From the medium vigorous group, B 54–118 and Ottawa 8 seem to be promising in Hungary's ecological conditions.
Hrotkó, K., Magyar, L. and Hanusz, B. (1997). APPLE ROOTSTOCK TRIALS AT THE FACULTY OF HORTICULTURE, UHF BUDAPEST (PRELIMINARY REPORT). Acta Hortic. 451, 153-160
growth reduction, tree size, productivity