Abstract
The growing of selected varieties of the EngUsh or Persian walnut, Juglans regia Linn., has necessitated the finding of suitable rootstocks. Often in the past the English root has not been available as a stock and has not been fully tested, except in seedling orchards. The eastern black walnut, J. nigra Linn., because of its slow growth in the nursery, can hardly be regarded as a commercial stock under California conditions. The California black walnuts, J. californica Wats, and J. hindsii Sarg., have been almost universally used as rootstocks for J. regia. A fungus disease has appeared which attacks the crowns and roots of these stocks. It is widely distributed and is assuming great economic importance. Walnut trees after reaching bearing age may die suddenly. Usually several in the same part of the grove are attacked. This paper reports and describes experiments dealing with this disease.
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Claims 3
Claim · model-written summary
A fungal disease attacks crowns and roots of California black walnut rootstocks.
- Taxon
- J. californica Wats
Juglans californicat0 - Interactor
- funguse0pathogen
- Outcome
- attacks the crowns and rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A fungus disease has appeared which attacks the crowns and roots of these stocks.”
t0“The California black walnuts, J. californica Wats, and J. hindsii Sarg.”
Claim · model-written summary
The fungal disease is widely distributed and economically important.
- Outcome
- widely distributede0
JuglansOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is widely distributed and is assuming great economic importance.”
t0“Juglans”
Claim · model-written summary
Bearing walnut trees may die suddenly, often with several affected in one grove area.
Verbatim
e0“Walnut trees after reaching bearing age may die suddenly. Usually several in the same part of the grove are attacked.”