Western white pine is an important conifer species that produces highly prized straight-grained, non-resinous wood used in lumber and value-added products. Once prevalent in BC’s forests, this white pine species almost vanished when, in the early 20th century, an exotic pathogen called Cronartium ribicola was introduced into North America from Europe — killing up to ninety-five percent of Canada’s wild stands of western white pine. “This situation may become worse because climate change makes the race between trees and pathogens even more unpredictable,” said Dr. Jun-Jun Liu, a molecular forest pathologist working to save the threatened pines.
The disease caused by this fungal invader is commonly called white pine blister rust (WPBR), it attacks and kills white pines of all ages. The impact of the fungus has led the federal government to declare one native white or five-needle pines (whitebark pine) endangered in accordance with the Species at Rick Act. …Liu and his team at Natural Resources Canada’s Pacific Forestry Centre in Victoria, British Columbia are engaged in long-term research to identify and enhance a genetic resistance road-map. They screen trees with disease resistance in order to develop genomics-based breeding tools.