Canadian Forest Service Publications
Oak Wilt. Fewster; V.; MacQuarrie; C.J.K.; Fidgen; J.G. 2021.Natural Resources Canada, Canadian Forest Service. Great Lakes Forestry Centre, Sault Ste. Marie, Ontario. Frontline Express 90. 2p.
Issued by: Great Lakes Forestry Centre
Catalog ID: 40399
Availability: PDF (download)
Plain Language Summary
Oak wilt is a tree disease caused by the fungus Bretziella fagacearum. The fungus is widespread throughout the eastern United States and, as of 2021, found within 600 m of the Canadian border near Windsor, Ontario. The fungus clogs the vascular system of the tree, causing mortality within 1 year in red oaks, and in 2-15 years in white oaks. Infected trees also produce pressure pads where beetles can pick up fungal spores and move the fungus to new stands. Within stands, infections can also be transmitted by root grafting. This publication describes the biology, impact and management options for oak wilt.