Volume 54 Number 2 Article 18
Year 2000 Month 4
Title: Performance of ´Gala` Apple on Four Semi-dwarf Rootstocks: A Five-Year Summary of the 1994 NC-140 Semi-dwarf Rootstock Trial
Authors: R.P. Marini, J.L. Anderson, B.H. Barritt, G.R. Brown, J. Cline, W.P. Cowgill, Jr., P.A. Domoto, D.C. Ferree, J. Garner, G.M. Greene, C. Hampson, P. Hirst, M.M. Kushad, E. Mielke, C.A. Mullins, M. Parker, R.L. Perry, J.P. Prive, G.L. Reighard, T. Robinson, C.R. Rom, T. Roper, J.R. Schupp, E. Stover, and R. Unrath
Abstract:
In 1994, trees of 'Gala' apple (Malus × domestica Borkh.) on 4 semi-dwarf rootstocks were planted
at 24 sites in North America according to the guidelines established for cooperative testing by the North
Central Regional Cooperative Project (NC-140). The four rootstocks were P.I, V.2, G.30, and M.26
EMLA. Tree losses were greatest for G.30 and M.26 EMLA. Trunk cross-sectional area was generally
largest for trees on P.I and smallest for trees on G.30. Tree height was usually greatest for P.I and tree
spread was usually smallest for M.26 EMLA. Although results were not consistent for all sites, yield
and yield efficiency (YE) tended to be highest for G.30 and lowest for P.I. When adjusted for number
of fruit per tree, fruit size was influenced by rootstock at only 7 sites.
Trees on P.I produced the smallest fruit at 5 of those 7 sites.
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