Sadwavirus is a genus of viruses in the order Picornavirales, in the family Secoviridae. Plants (specifically Satsuma mandarin trees) serve as natural hosts. There is currently only one species in this genus: the type species Satsuma dwarf virus. Diseases associated with this genus include: satsuma dwarf virus disease which causes spoon-shaped leaves on citrus tree. Symptoms are enations, multiple flushing, stunting or dwarfing, reduction in number and size of leaves and fruits. The name of this genus comes from its type species: Satsuma dwarf virus.