Myrobalan Selections As Rootstocks for Plum
DOI:
https://doi.org/10.71318/apom.1972.26.1.10Abstract
Variable degrees of incompatibility in the graft union of 'Stanley' plum on 'Myrobalan' rootstock has been observed during the last decade. In commercial plum orchards in Michigan, many trees have been observed to decline in the sixth year in the orchard, when they come into fruit. Such trees have been found to have a reduced root system and an enlarged trunk immediately above the graft (Fig. 1). The rootstock portion of the trunk is much reduced, giving the appearance of a constriction in the graft union area. This disorder has been referred to as the "constriction disease" of plums.
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