|Authors: ||P.J. Ellis, R.H. Converse, R. Stace-Smith|
A survey based on ELISA was made on cultivated elderberry (Sambucus canadensis) in North America.
A commercial planting in Oregon, comprising a mixture of cultivars, was tested for cherry leaf roll virus (CLRV), elderberry latent virus (ELV), the European strain of elderberry carlavirus (ECV-E) and a North American strain of elderberry carlavirus (ECV-NA). Of 224 plants in this field tested by ELISA for these four viruses, 124 were infected with CLRV, four with ELV, 30 with ECV-E, 187 with ECV-NA, while 14 were free from these four viruses.
Single clones of ten S. canadensis 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 four viruses.
The cvs Adams No. 1, Kent, New York No. 21, Scotia and Victoria were each infected with one virus.
Adams No. 2 and York were infected by two, Johns and Nova by three, and Maxima by all four viruses.
After thermotherapy and excision of 2-node cuttings, several clones of Adams No. 1, Adams No. 2 and York were found to be free from these viruses and have been propagated for release to industry.
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