First report of plum pox potyvirus in Canada
Following the introduction of plum pox potyvirus (PPV - EPPO A2 quarantine pest) into Pennsylvania, US (see EPPO RS 99/169), the Canadian Food Inspection Agency conducted surveys for this virus in fruit tree orchards. In June 2000, PPV was detected for the first time on 3 nectarine trees at two sites in an orchard near Niagara-on-the-Lake, Ontario. The strain of the virus found in Canada was identified as PPV-D (as in Pennsylvania). Surveillance continued in the Niagara Peninsula. As of 2000-09-08, 41,346 samples had been tested and 681 positive samples were found. These positive samples came from 30 different locations: 27 in the Niagara Peninsula (near Niagara-on-the-Lake, St Catharines, Lincoln), 1 near Simcoe and 2 near Blenheim (southwestern Ontario). It had been thought at first that PPV was introduced from Pennsylvania, as the first infected trees were imported from this state. But the later findings in Blenheim where the trees did not originate from Pennsylvania led to reconsideration of the possible origin of this introduction, which remains so far unknown. To determine the extent of the disease, other areas in Ontario and other regions of Canada will be surveyed. The status of plum pox potyvirus in Canada can be described as: Present: only in some areas (Ontario), under eradication.
Sources
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INTERNET
Plum pox virus confirmed in Canada
http://www.cfia-acia.agr.ca/english/corpaffr/newsrelease/20000623e.shtml
CFIA plum pox virus survey update – September 12, 2000.
http://www.cfia-acia.agr.ca/english/plaveg/hort/survey4e.shtml
PROMED posting of 27 June 2000 – Plum pox virus, nectarines. Canada (Ontario)
http://www.promed.org
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