title: [Difficulties and improvements of the serological method applied to the study of plant viruses].
mesh_terms: D007106:Immune Sera; D061066:Plant Pathology; D010942:Plant Viruses; D010944:Plants / Q000821:virology*; D014780:Viruses
chemical_list: D007106:Immune Sera
keywords: IMMUNE SERUMS; PLANTS/virology; VIRUSES