Fire Blight Susceptibility of Dwarfing Apple Rootstocks
DOI:
https://doi.org/10.71318/apom.1975.29.2.30Abstract
Fire blight susceptibility data for Malling and Malling-Merton apple dwarfing rootstocks are summarized. Clonal rootstocks showed about the same degree of fire blight susceptibility at all test locations. Of 28 rootstocks classified, 9 were slightly, 12 moderately, 5 severely, and 2 very severely susceptible. The degree of blight susceptibility of the scion cultivar may or may not be influenced by the degree of susceptibility of the clonal rootstock. The scion-rootstock interaction should be considered before new apple orchards are planned in areas where fire blight is a problem.
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