Alfalfa mosaic virus

Alfalfa mosaic virus (AMV), also known as Lucerne mosaic virus or Potato calico virus, is a worldwide distributed phytopathogen that can lead to necrosis and yellow mosaics on a large variety of plant species, including commercially important crops. It is the only species in the Alfamovirus genus of the family Bromoviridae. In 1931 Weimer J.L. was the first to report AMV in alfalfa (Medicago sativa). Transmission of the virus occurs mainly by some aphids (plant lice), by seeds or by pollen to the seed.