Walnuts, Xanthomonas, Bacterial diseases, Western Australia
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Bacterial blight is the most important disease of walnuts in Western Australia.
In bad seasons it can cause heavy losses in susceptible varieties such as Wilson's Wonder, and in some seedling trees.
Carefully timed sprays greatly reduce the incidence of bacterial blight, and it is also recommended that less susceptible varieties—such as Franquette— should be used for new plantings.
Goss, O M. and Doepel, R. F.
"Bacterial blight or Black spot of walnuts,"
Journal of the Department of Agriculture, Western Australia, Series 4: Vol. 2
, Article 12.
Available at: https://researchlibrary.agric.wa.gov.au/journal_agriculture4/vol2/iss10/12