Oak Wilt Threatening Oak Trees in Canada

Did you know? Oak wilt kills thousands of oak trees each year in urban and natural forests.

Oak wilt is a vascular disease of oak trees, caused by the fungus Bretziella fagacearum*. The fungus grows on the outer sapwood of oak trees, restricting the flow of water and nutrients through the tree. Some oak species are more vulnerable than others and can die within a year of infection. In some severe cases, red oaks can mortality can occur within 2-6 weeks following infection.

For more information please visit:
https://www.invasivespeciescentre.ca/invasive-species/meet-the-species/invasive-pathogens/oak-wilt/