Spotted Lanternfly Lycorma delicatula Home 9 2023 9 December ( Page 2 ) 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,...
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 Agrilus planipennis Home 9 Invaders 9 Category: Forest Pests & Pathogens 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....
Spongy Moth Lymantria dispar Home 9 Tag: Gypsy Moth 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 America in the late 1860’s near Boston and...
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 Dendroctonus ponderosae Home 9 Invaders 9 Category: Forest Pests & Pathogens What is Ontario Doing? To prevent this unwanted invader from coming into the province, Ontario has regulated mountain pine beetle as...
Beech Bark Disease Neonectria faginata Home 9 Tag: Beech Bark Disease 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 introduced...
Butternut Canker Ophiognomonia clavigignenti-juglandacearum Home 9 Tag: Forest Pests & Pathogens 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...
Dutch Elm Disease Ophiostoma ulmi Home 9 Tag: Forest Pests & Pathogens 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...
Oak Wilt Bretziella fagacearum Home 9 Tag: Oak Wilt 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 infected to healthy...
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 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...
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