Potato mop-top virus (PMTV) is a member of the genus Pomovirus. The virus, first found in Germany has now spread throughout Europe, Asia, South America, and North America. Many disease management systems have been found to be ineffective against the virus, although a combination of sanitation and vector controls seems to work well. PMTV is a plant pathogenic virus transmitted through the vector Spongospora subterranea that affects potatoes.