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Watermelon mosaic virus also known as Marrow mosaic virus , Melon mosaic virus , and until recently Watermelon mosaic virus type 2 , is a plant pathogenic virus that causes viral infection in many different plants. The virus itself is referred to as Watermelon Mosaic Virus II or WMV-2 and is an isolate of the U.S. WMV-2 is a ssRNA positive strand virus that is part of the Potyviridae or Potyvirus clade. Like all RNA viruses, it contains a protein capsid which protects the inner viral RNA. First described on squash in Florida, WMV arose from a unique recombination of genetic material contributed by Soybean mosaic virus and Bean common mosaic virus along with Peanut Stripe virus.
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