New Life for Old ‘Spy’ Trees
DOI:
https://doi.org/10.71318/apom.1973.27.4.91Abstract
The 'Northern Spy' apple tree, often referred to simply as 'Spy', is a large tree when on its own or seedling roots, and has an upright, free growing habit. Its characteristic vigour makes it somewhat difficult to control even on 'M.9' or 'M.26' roots. Although in the past 'Spy' seedlings have themselves been used as rootstocks on this continent because of their vigorous, strong roots, they have been shown to have certain dwarfing properties in other areas. Hence, the root-aphid resistant 'Northern Spy' is one parent in the 'Malling Merton' series of rootstocks.
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