Calag Archive
Calag Archive
Blackline in walnuts: Delayed failure of unions killing many walnut trees in central coastal counties
Publication Information
California Agriculture 13(3):8-9.
Published March 01, 1959
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Abstract
Killing of a narrow strip of cambium and bark at the union of the Persian– Juglans regia–or English, walnut tree top and its rootstock is causing increasing losses of individual trees–even abandonment of entire mature orchards –in the walnut producing areas adjacent to San Francisco Bay.