Volume 51 Number 3 Article 32
Year 1997 Month 7
Title: Growth and Fruiting of a Spur-Type and a Standard Strain of īGolden Delicious` On Several Rootstocks Over Eighteen Years
Authors: J.A. Barden and R.P. Marini
Abstract:
'Goldspur' a spur-type, and 'Smoothee,' a standard strain, of 'Golden Delicious' apple were evaluated on
several rootstocks/interstems for 18 years.
The dwarfs included Mailing 9 (M.9), M.26, M.9/Malling Merton
106 (MM.106), and M.9/MM.111; the semi-dwarfs were M.7, MM. 106, and MM.111.
Five single-treeplots
were used.
In-row spacings were varied with anticipated tree vigor and ranged from 1.8 to 5.5 m; between-row spacing was constant at 6.1 m.
Both 'Goldspur' and 'Smoothee' trees were larger in trunk
cross-sectional area (TCA) and height on M.26 and M.9/MM.111 than on M.9 or M.9/MM.106. Tree size on
the three semi-dwarf rootstocks was largely unaffected by rootstock.
Overall, the most root suckers occurred
on trees of both strains on M.9/MM. 111 and M.7. Yield per tree for both strains tended to be greater on M.26
and M.9/MM.111 than on either M.9 or M.9/MM.106. Although not significantly different, per-tree yields
tended to be higher on MM.111 than on M.1 or MM.106. Crop density, yield efficiency, and average fruit
weight varied relatively little among the various scion/rootstock combinations.
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