Volume 50 Number 1 Article 9
Year 1996 Month 1
Title: Rootstock Effects Terminal Bud Set in 'Starkspur Supreme Delicious' Apples
Authors: J.D. Conrod, D.J. Larson and E.E. Hoover
Abstract:
Cold hardiness is a major consideration in selecting suitable apple rootstocks
as well as scion cultivars for
Minnesota and other northern regions.
Rootstocks effect many processes in
apple tree growth including dwarfing,
fruit ripening, and cold hardiness (1).
One of the most important ways rootstocks
influence hardiness of the scion
cultivar is by inducing earlier maturity
in the fall and delaying budbreak in
the spring.
Apple rootstocks, such as
M.9 and M.7, have been shown to
induce early maturity of the scion
cultivar and thus tended to protect
trees from fall freezes (7). However,
induction of early maturity of the scion
does not always translate to an increase
in midwinter hardiness.
Holubowicz
et al. (3) demonstrated apple rootstocks differ in their midwinter hardiness and ability to deacclimate in winter as well as to affect the timing of
growth processes in scions.
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