Canadian Forest Service Publications
First Report of Powdery Mildew of Mahonia aquifolium (Pursh.) Nutt. Caused by Erysiphe (Microsphaera) berberidis (DC.) Lév in Canada. 2005. Zhao, S.; Shamoun, S.F. Plant Health Progress (Online journal): Not paginated.
Issued by: Pacific Forestry Centre
Catalog ID: 26222
CFS Availability: PDF (request by e-mail)
Available from the Journal's Web site. †
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Mahonia aquifolium (Tall Oregon Grape) is a plant native to British Columbia and the coastal Pacific Northwest of the USA. The first discovery of powdery mildew of Mahonia aquifolium in the USA was reported in Washington State in 2003. In Canada, powdery mildew of Oregon grape was discovered in the early summer of 2004 in Victoria, BC. To our knowledge, this is the first record of powdery mildew caused by E. berberidis on Oregon grape in Canada.