Volume 50 Number 4 Article 42
Year 1996 Month 10
Title: Performance of Ten Vigorous and Semi-Vigorous Apple Rootstocks Over Ten Years in British Columbia
Authors: C.R. Hampson, H.A. Quamme and R.T. Brownlee
Abstract:
A trial of 'Macspur Mclntosh' on four seedling
rootstocks (open-pollinated Antonovka, openpollinated
Haralson, Antonovka × Beautiful
Arcade, Haralson × Beautiful Arcade) and six
clonal rootstocks (B.118,I.48-41, M.2, M.4, M.7
and MO.56-4) was planted in 1986 to identify
cold-hardy, yield-efficient apple rootstocks
adapted to southern British Columbia.
Spread
and trunk cross-sectional area (TCA) were
greatest for trees on MO.56-4 and smallest for
trees on M.7. The height, spread and TCA of
trees on the open-pollinated seedling rootstocks
did not differ significantly, but TCA for trees
on Haralson × Beautiful Arcade and Antonovka
× Beautiful Arcade were smaller than on the
open-pollinated seedling rootstocks.
Trees on
M.7 were the most precocious.
Cumulative
yield was high on MO.56-4, but its cumulative
yield efficiency (cumulative yield/final trunk
cross-sectional area) was among the lowest.
Cumulative yield efficiency and canopy efficiency (cumulative yield/canopy volume over
the last five years) were highest on M.7, M.4,
and I.48-41. B.118 was similar to M.4 in height,
spread, and TCA, but slightly lower in cumulative yield efficiency.
All tne seedling rootstocks
were less precocious than M.7, and lower in
cumulative yield efficiency than M.7 or M.4,
but not M.2. Fruits from trees on Haralson ×
Beautiful Arcade and Antonovka × Beautiful
Arcade were among the smallest.
Rootstock did
not affect the incidence of windfalls or the
degree of bienniality of the scion.
I.48-41, M.7
and open pollinated Haralson produced the
most root suckers.
Although yield performance
was good on M.7, one of tne trees died and
another was seriously injured by a winter freeze
during the study.
Overall, M.4, B.118 and I.48-
41 appear to have the greatest potential for cold
sites.
Full text download: APS subscribers
ISHS members & pay-per-view
(PDF 680455 bytes)
Translate:
APS membership administration
ISHS membership administration
