English walnut rootstocks help avoid blackline disease, but produce less than ‘Paradox’ hybrid

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...

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Bibliographic Details
Main Authors: Joseph Grant, Gale McGranahan
Format: Article
Language:English
Published: University of California Agriculture and Natural Resources 2005-10-01
Series:California Agriculture
Online Access:http://calag.ucanr.edu/archive/?article=ca.v059n04p249
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spelling doaj-087b21d434b045ff8059e1fd994bcc282020-11-24T22:16:37ZengUniversity of California Agriculture and Natural ResourcesCalifornia Agriculture0008-08452160-80912005-10-0159424925110.3733/ca.v059n04p24910.3733/cav059n04_13English walnut rootstocks help avoid blackline disease, but produce less than ‘Paradox’ hybridJoseph Grant0Gale McGranahan1J.A. Grant is Farm Advisor, UC Cooperative Extension, San Joaquin CountyG.H. McGranahan is Pomologist, Department of Plant Sciences, UC Davis. The authors thank walnut grower Jim Ferrari of Linden for hosting these trials and the California Walnut Marketing Board for supporting them.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.http://calag.ucanr.edu/archive/?article=ca.v059n04p249
collection DOAJ
language English
format Article
sources DOAJ
author Joseph Grant
Gale McGranahan
spellingShingle Joseph Grant
Gale McGranahan
English walnut rootstocks help avoid blackline disease, but produce less than ‘Paradox’ hybrid
California Agriculture
author_facet Joseph Grant
Gale McGranahan
author_sort Joseph Grant
title English walnut rootstocks help avoid blackline disease, but produce less than ‘Paradox’ hybrid
title_short English walnut rootstocks help avoid blackline disease, but produce less than ‘Paradox’ hybrid
title_full English walnut rootstocks help avoid blackline disease, but produce less than ‘Paradox’ hybrid
title_fullStr English walnut rootstocks help avoid blackline disease, but produce less than ‘Paradox’ hybrid
title_full_unstemmed English walnut rootstocks help avoid blackline disease, but produce less than ‘Paradox’ hybrid
title_sort english walnut rootstocks help avoid blackline disease, but produce less than ‘paradox’ hybrid
publisher University of California Agriculture and Natural Resources
series California Agriculture
issn 0008-0845
2160-8091
publishDate 2005-10-01
description 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.
url http://calag.ucanr.edu/archive/?article=ca.v059n04p249
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AT galemcgranahan englishwalnutrootstockshelpavoidblacklinediseasebutproducelessthanparadoxhybrid
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