Tobamovirus is a genus in the virus family Virgaviridae. Many plants, including tobacco, potato, tomato, and squash, serve as natural hosts. There are currently 35 species in this genus including the type species Tobacco mosaic virus. Diseases associated with this genus include: necrotic lesions on leaves. The name Tobamovirus is an acronym, coming from the host and symptoms of the first virus discovered (Tobacco mosaic virus).