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Subject: Arabis mosaic virus intercepted in Michigan (USA)
Date posted: April 01, 2002
A new cultivar of Phlox 'Becky Towe', originating from the UK and received by a large perennial grower in Michigan, tested positive for arabis mosaic virus (AMV) in November 2001. AMV is endemic in Europe and is of restricted distribution in the US and Canada, being associated chiefly with greenhouse operations. This virus has a wide host range, infecting species from 28 different dicotyledonous families and including important ornamental and crop plants. Its principal hosts are strawberries (Fragaria), hops (Arabis), Vitis spp., and raspberries (Rubus idaeus). AMV is spread most effectively via vegetatively proprogated material, however seed transmission is a common feature, and the nematode Xiphinema diversicaudatum has been shown to transmit the virus over short distances. Symptoms of AMV disappear soon after infection, but affected plants may remain stunted.