Mountain Pine Beetle Dendroctonus ponderosae Home 9 Category: Invaders ( Page 8 ) What is Ontario Doing? To prevent this unwanted invader from coming into the province, Ontario has regulated mountain pine beetle as prohibited under the Invasive Species...
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 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 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 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...
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