Disease Note

First Report of Alfalfa Mosaic Virus Infecting Viburnum in Canada. A. W. Chiko, Saanichton Research and Plant Quarantine Station, Sidney, B.C. V8L 1H3, Canada. S. E. Godkin, Saanichton Research and Plant Quarantine Station, Sidney, B.C. V8L 1H3, Canada. Plant Dis. 70:173. Accepted for publication 27 September 1985. Copyright 1986 The American Phytopathological Society. DOI: 10.1094/PD-70-173a.

Viburnum opulus L. ‘Sterile’ showing a bright yellow mosaic on about one-half the foliage was observed at a garden center near Victoria, B.C. Viruslike symptoms were produced in several species of herbaceous test plants after manual inoculation with leaf extract from this ornamental, and bacilliform particles were subsequently detected in leaf-dip preparations from selected inoculated plants. In immunodiffusion tests, virus in crude extracts from both inoculated and systemically infected leaves of Chenopodium quinoa Willd. reacted strongly with alfalfa mosaic virus (AMV) antisera obtained from D. Z. Maat and G. I. Mink. Previous workers in Germany and the United States showed similar diseases of Viburnum to be caused by AMV.