English walnut rootstocks help avoid blackline disease, but produce less than ‘Paradox’ hybrid
While ‘Paradox’ hybrid seedlings are often the rootstocks of choice for California walnut orchards, there is a resurgence of interest in using English walnut seedlings because walnut blackline disease, which is endemic in many California walnut production districts, does n...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
University of California Agriculture and Natural Resources
2005-10-01
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| Series: | California Agriculture |
| Online Access: | http://calag.ucanr.edu/archive/?article=ca.v059n04p249 |
| Summary: | While ‘Paradox’ hybrid seedlings are often the rootstocks of choice for California
walnut orchards, there is a resurgence of interest in using English walnut seedlings
because walnut blackline disease, which is endemic in many California walnut production
districts, does not affect them. We compared the growth and productivity of walnuts
on English rootstocks from a variety of sources to those on Paradox rootstock. The
growth and productivity of ‘Chandler’ walnut trees were similar among trees on seedling
English rootstocks in one trial, but trees on English rootstocks were smaller and
had lower production than Paradox hybrid-rooted trees in the other. |
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| ISSN: | 0008-0845 2160-8091 |