Pear Rootstocks: Present and Future
DOI:
https://doi.org/10.71318/apom.1982.37.1.24Abstract
Early work on pear rootstocks in the west centered around the search for resistance to fire blight ( Erwinia amylovora(Bur.) Winslow, et al). F. C. Reimer collected blight resistant stocks such as Old Home and Farmingdale of European origin as well as a number of primitive species from Asia (7, 8). With the appearance in the 1950's of the new disease "Pear Decline," research was renewed on pear rootstocks in the western states (2, 11, 16, 21). It was learned that Pear Decline is caused by a pathogen, probably a mycoplasma, injected into the trees by infected psylla insects feeding on the leaves. The pathogen moves through the living bark down ward to the root. If the rootstock is susceptible, phloem necrosis occurs below the graft union, causing the tree to die (1, 5, 6, 15, 19). Resistance to Decline was shown to be genetic ally controlled (12).
Downloads
Published
License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
The American Pomological Society and Editors cannot be held responsible for the views and opinions expressed by individual authors of articles published herein. This also applies to any supplemental materials residing on this website that are linked to these articles. The publication of advertisements does not constitute any endorsement of products by the American Pomological Society or Editors.
