potato yellow mosaic virus potato yellow mosaic virus potato yellow mosaic virus (pymv) is a plant pathogenic virus of the family geminiviridae. potato yellow mosaic virus virus classification (unranked): virus realm: monodnaviria kingdom: shotokuvirae phylum: cressdnaviricota class: repensiviricetes order: geplafuvirales family: geminiviridae genus: begomovirus species: potato yellow mosaic virus