Canadian Forest Service Publications

Sudden oak death (Phytophthora ramorum): Research contribution at the Canadian Forest Service/L’encre de chênes rouges (Phytophthora ramorum): contribution aux recherches menées au Service canadien des forêts. 2012. Rioux, D.; Lagacé, M.; Shamoun, S.F. Pages 146-147 in Proceedings of the Forest Pest Management Forum 2011/Compte rendu du Forum sur la répression des ravageurs forestiers 2011, December 6-8, 2011, Ottawa Convention Centre, Ottawa, ON. Natural Resources Canada, Canadian Forest Service, Ottawa, Ontario.

Year: 2012

Issued by: Pacific Forestry Centre

Catalog ID: 34157

Language: English / French

Availability: PDF (download)

Mark record


Phytophthora ramorum (Pr) is mainly known as the causal agent of sudden oak death (= ramorum bleeding canker) in North America and ramorum blight in Europe. It can infect over 120 hosts, several of which are present in Canadian forested and urban areas. Movement of infected nursery stock is probably the highest risk pathway for reaching Canadian forests and indeed the disease has been detected and eradicated several times from nurseries in British Columbia since it was first observed in 2003. Our research activities have been mainly carried out to better understand the biology, population genetics, and mitigation measures to help assess the risk associated with Pr in Canada. Our studies deal with the: 1) evaluation of susceptibility of nursery plants, forest vegetation and tree species common to eastern and western Canada; 2) development of DNA markers to identify the three Pr lineages; 3) assessment of the aggressiveness of these lineages; 4) efficacy of biocontrol products and commercial fungicides; and 5) research to determine resistance mechanisms in trees.