Umbravirus is a genus of plant viruses assigned to the family Tombusviridae. The genus has 11 species. Transmission may be by aphids or mechanical inoculation. The genome is a linear, positive-sense, single-stranded RNA, 4200–6900 nucleotides in length. Taxonomy The genus contains the following species: Carrot mottle mimic virus Carrot mottle virus Ethiopian tobacco bushy top virus Groundnut rosette virus Ixeridium yellow mottle virus 2 Lettuce speckles mottle virus Opium poppy mosaic virus Patrinia mild mottle virus Pea enation mosaic virus 2 Tobacco bushy top virus Tobacco mottle virus References External links Viralzone: Umbravirus Umbraviruses Viral plant pathogens and diseases Virus genera