Title: Viruses in plant hosts
Subjects: Plant viruses, Host plants, Host-parasite relationships, Host-virus relationships, Mosaique du tabac, Plantes-hotes, Virus diseases of plants, Plantes, Jaunisse de la betterave, Maladies a virus, Tobacco mosaic virus, Beet yellows, Virus phytopathogenes, Relations hote-virus, Closterovirus