cassava green mottle virus cassava green mottle virus cassava green mottle virus (cgmv) is a plant pathogenic virus of the family secoviridae. cassava green mottle virus virus classification (unranked): virus realm: riboviria kingdom: orthornavirae phylum: pisuviricota class: pisoniviricetes order: picornavirales family: secoviridae genus: nepovirus species: cassava green mottle virus