Volume 45 Number 4 Article 11
Year 1991 Month 10
Title: Rootstock Affects Ripening, Size, Mineral Composition, and Storabiiity of 'Starkspur Supreme Delicious' in the 1980-81 NC-140 Cooperative Planting
Authors: W.R. Autio, J.A. Barden, and G.R. Brown
Abstract:
'Starkspur Supreme Delicious' apple trees on
O.3, M.7 EMLA, M.9 EMLA, M.26 EMLA,
M.27 EMLA, M.9, MAC.9 (Mark), MAC.24,
and OAR 1 were planted in Belchertown, MA,
Blacksburg, VA, and in Princeton, KY in 1980
and 1981. Assessment of fruit ripening in 1986-
1989 in Massachusetts suggested that early fruit
ripening was encouraged by M.27 EMLA and
late fruit ripening was encouraged by M.7
EMLA. In Virginia, data from 1985-1987 sug
gested that M.9 EMLA and O.3 encouraged
early ripening and that MAC.24 and OAR 1
encouraged late ripening.
In Kentucky, data
from 1985-1989 suggested that M.27 EMLA and
MAC.9 encouraged early ripening and MAC.24
and OAR 1 encouraged late ripening.
Fruit size
in Massachusetts (1986-1989) was largest on
average from trees on M.9 EMLA and smallest
from trees on OAR 1. In Massachusetts, fruit
calcium (Ca) content (1986-1988) of fruit from
trees on MAC.9 was consistently in the highest
category, and that of fruit from trees on OAR 1
was consistently in the lowest category.
The
incidence of storage disorders in Massachusetts
related to fruit Ca content in 1987 and ripening
in 1988.
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