I don’t know but if I were you I would look into this guy and the book he has written about Plum island called “Lab 257”.
Cross-Kingdom VirusesCertain virus families / groupings cross “kingdom” or phylum boundaries.
For example, virus families infecting two kingdoms of organisms are: Bunyaviruses: animals and plants Partitiviruses: plants and fungi Reoviruses: animals and plants Rhabdoviruses: animals and plants Phycodnaviruses: protozoa and plants Picornavirus-like viruses: plants and animals Totiviruses: protozoa / fungi and insects – tentative
The reasons for this are probably caught up in their evolution and cospeciation with their hosts see also here.
via Virus Classification.
Virus classification involves naming and placing viruses into a taxonomic system. Like the relatively consistent classification systems seen for cellular organisms, virus classification is the subject of ongoing debate and proposals. This is largely due to the pseudo-living nature of viruses, which are not yet definitively living or non-living. As such, they do not fit neatly into the established biological classification system in place for cellular organisms, such as eukaryotes and prokaryotes.