Articles
WALNUT BLIGHT (XANTHOMONAS ARBORICOLA PV. JUGLANDIS): FACTORS INFLUENCING DISEASE INCIDENCE
Article number
705_64
Pages
443 – 446
Language
English
Abstract
The effect of several factors on walnut blight incidence and severity have been studied.
These factors included plant material, with eight Californian varieties (Amigo, Chandler, Chico, Hartley, Howard, Sundland, Tehama and Vina) and two rootstocks (Juglans hindsii and Paradox), spatial orientation of trees, location in the canopy, and presence of aphis (Cromaphis juglandicola).
Walnut cultivars showed a different rate of susceptibility to the disease, but the two rootstocks studied did not show significant differences on fruit or leaf lesions.
The spatial orientation of the trees did not affect the incidence of the disease on fruits, but disease incidence varied in the different areas of the canopy.
The presence of aphis did not increase the percentage affected fruits, but it favored a higher incidence of the disease on leaves.
These factors included plant material, with eight Californian varieties (Amigo, Chandler, Chico, Hartley, Howard, Sundland, Tehama and Vina) and two rootstocks (Juglans hindsii and Paradox), spatial orientation of trees, location in the canopy, and presence of aphis (Cromaphis juglandicola).
Walnut cultivars showed a different rate of susceptibility to the disease, but the two rootstocks studied did not show significant differences on fruit or leaf lesions.
The spatial orientation of the trees did not affect the incidence of the disease on fruits, but disease incidence varied in the different areas of the canopy.
The presence of aphis did not increase the percentage affected fruits, but it favored a higher incidence of the disease on leaves.
Publication
Authors
O. Arquero, M. Lovera, R. Rodriguez, A. Trapero
Keywords
Juglans regia, walnut blight, Xanthomonas, Cromaphis juglandicola, cultivars, rootstock
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