Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Viruses of Sambucus canadensis in North America.

Abstract

A commercial elderberry planting in Oregon, USA, comprising a mixture of cultivars, was tested for cherry leaf roll nepovirus (CLRV), elderberry latent carmovirus (ELV), the European strain of elderberry carlavirus (ECV-E) and a North American strain of elderberry carlavirus (ECV-NA). Of 224 plants tested by ELISA for these 4 viruses, 124 were infected by CLRV, 4 by ELV, 30 by ECV-E, 187 by ECV-NA and 14 were free of all 4 viruses. Single clones of 10 elderberry cultivars from research and commercial sources in North America were evaluated by ELISA for the presence of these viruses. None of the clones tested were free from all 4 viruses. Cultivars Adams No. 1, Kent, New York No. 21, Scotia and Victoria were each infected with 1 virus, Adams No. 2 and York were infected by 2, Johns and Nova by 3 and Maxima by all 4 viruses. After thermotherapy and excision of 2-node cuttings, several clones of Adams No. 1, Adams No. 2 and York were free from these viruses and were propagated for release to industry. This paper was presented at the 15th International symposium on virus and virus diseases of temperate fruit crops held in Vienna, Austria, 8-13 Jul., 1991.