Trees of 200-Year Old Newtown Apple Cultivar Found Free of Commonly-Occurring Viruses
DOI:
https://doi.org/10.71318/apom.1970.24.3.56Abstract
The means by which viruses are disseminated must usually be determined by planned experiment. However it is often possible to gain knowledge of the patterns of spread, and the extent of such spread, by orchard surveys and by sample indexing of trees in commercial plantings. The rate at which new cultivars become infected provides useful evidence. The persistence of freedom from virus infection in older cultivars has comparable significance.
A recent determination that two trees of Newtown apple are free from detectable virus infection, offers interesting circumstantial evidence that orchard spread of viruses in apple must be uncommon, because this cultivar has been commercially grown in North America for more than 200 years.
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.
