Rootstock Performance in Nova Scotia
DOI:
https://doi.org/10.71318/apom.1975.29.2.36Abstract
Challenging questions concerning apple rootstocks can be summarized as follows:
The fundamental questions is not "what is the best rootstock?"; rather, "what density should it be planted?" Once this has been answered, it will be necessary to decide on the proper management system. Once density and management have been determined, then, and only then, can the stocks be selected to fit the cultivars and soils of the proposed orchard.
Evaluation of stocks could be simplified if it were known whetther or not the ability of the scion variety to utilize incident energy is directly altered by the stock. There is no question that growth patterns—shoot elongation, blossom formation, set, etc. are altered. But, for example, are 'McIntosh' leaves over an 'M.9' stock physiologically acting the same as 'McIntosh' leaves over a seedling stock? Does 'M.9' produce the elusive florigen or is the high rqte of blossom induction due primarily to earlier cessation of growth and/or to greater efficiency of the cultivar scion leaves?
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