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Beech Bark Disease

Beech Bark Disease

Beech Bark Disease Neonectria faginata  Home 9 Category: Invaders ( Page 8 ) Background Beech bark disease is a new threat affecting beech (Fagus grandifolia) trees in Canada’s hardwood and mixed forests. This disease is caused by a combination of an...
Butternut Canker

Butternut Canker

Butternut Canker Ophiognomonia clavigignenti-juglandacearum  Home 9 Category: Invaders ( Page 8 ) Background Butternut canker is a fungus that infects and kills healthy butternut trees (Juglans cinerea) of any size or age. We don’t know where the disease...
Dutch Elm Disease

Dutch Elm Disease

Dutch Elm Disease Ophiostoma ulmi  Home 9 2021 9 March ( Page 11 ) Background Dutch elm disease is caused by a fungus (Ophiostoma ulmi) that has been killing native elm trees in North America. The disease is spread by both a native elm bark beetle...
Oak Wilt

Oak Wilt

Oak Wilt Bretziella fagacearum  Home 9 2021 9 March ( Page 11 ) Background Oak wilt is a fungal pathogen (Bretziella fagacearum) killing thousands of oak trees in North American forests and woodlands each year. The fungus is able to spread from...
Sudden Oak Death

Sudden Oak Death

Sudden Oak Death Phytophthora ramorum  Home 9 2021 9 March ( Page 12 ) Background Sudden oak death is a disease affecting species of trees caused by a fungal-like organism. Established in localized areas of North America, the native range of the...
Thousand Cankers Disease

Thousand Cankers Disease

Thousand Cankers Disease Geosmithia morbida  Home 9 2021 9 March ( Page 12 ) Background Thousand cankers disease is a new threat that has been linked to the death of eastern black walnut trees in the United States over the last decade. The native...