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Brome Mosaic Virus Isolated in Manitoba, Canada. S. Haber, Research Station, Agriculture Canada, Winnipeg, Manitoba R3T 2M9, Canada. R. I. Hamilton, Research Station, Agriculture Canada, Vancouver, British Columbia V6T 1X2, Canada. Plant Dis. 73:195-199. Accepted for publication 28 August 1988. Copyright 1989 The American Phytopathological Society. DOI: 10.1094/PD-73-0195.

Brome mosaic virus (BMV) was isolated from trial plots of spring wheat (Triticum aestivum), barley (Hordeum vulgare), and bromegrass (Bromus inermis) along roadways at Portage la Prairie and Glenlea, Manitoba. Symptoms were stunting, mosaic, and streaking. The Portage isolate of BMV (BMV-P) was serologically identical to the Nebraska type isolate (BMV-N), but differed in the symptoms it induced in Datura stramonium, Chenopodium quinoa, and C. amaranticolor, and in the pattern of double-stranded RNA species isolated from infected tissue. In greenhouse tests, BMV-P markedly reduced biomass, tillering, and yield in several commercial bread and durum wheat cultivars.