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Spotted Lanternfly

Spotted Lanternfly

Spotted Lanternfly Lycorma delicatula  Home 9 Search query for: Background Spotted lanternfly (SLF) is a planthopper insect that is native to southeastern Asia. It was first discovered in North America in 2014 in Berks County, Pennsylvania, and has since...
Asian Long-horned Beetle

Asian Long-horned Beetle

Asian Long-horned Beetle Anoplophora glabripennis  Home 9 Category: Invaders ( Page 7 ) Background Asian long-horned beetle (ALHB) is an invasive forest pest with no natural enemies in North America that attacks nearly all broadleaf trees, with native...
Emerald Ash Borer

Emerald Ash Borer

Emerald Ash Borer Agrilus planipennis  Home 9 Category: Invaders ( Page 8 ) Background Emerald ash borer is a forest pest native to Asia that has killed millions of Ash trees in southwestern Ontario, and the Great Lakes States. Due to its major economic...
Spongy Moth

Spongy Moth

Spongy Moth Lymantria dispar  Home 9 Invaders 9 Category: Forest Pests & Pathogens Background Spongy moth is an insect native to Europe and Asia that has been severely weakening trees across North America. Spongy moth was introduced to North...
Invasive Earthworms

Invasive Earthworms

Invasive Earthworms  Home 9 Invaders 9 Category: Forest Pests & Pathogens Background Native earthworms from Canada were removed by the last glaciers and of the 19 species confirmed in Ontario, 17 originate from Europe and 2 from the United...
Mountain Pine Beetle

Mountain Pine Beetle

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

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...