Spotted Lanternfly Lycorma delicatula Home 9 Category: Invaders 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 Anoplophora glabripennis Home 9 Tag: Asian Long-horned Beetle 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 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 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 Invaders 9 Category: Forest Pests & Pathogens ( Page 2 ) Background Beech bark disease is a new threat affecting beech (Fagus grandifolia) trees in Canada’s hardwood and mixed forests. This disease...
Butternut Canker Ophiognomonia clavigignenti-juglandacearum Home 9 Invaders 9 Category: Forest Pests & Pathogens ( Page 2 ) Background Butternut canker is a fungus that infects and kills healthy butternut trees (Juglans cinerea) of any size or...
Dutch Elm Disease Ophiostoma ulmi Home 9 Invaders 9 Category: Forest Pests & Pathogens ( Page 2 ) 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...
Oak Wilt Bretziella fagacearum Home 9 Invaders 9 Category: Forest Pests & Pathogens ( Page 2 ) Background Oak wilt is a fungal pathogen (Bretziella fagacearum) killing thousands of oak trees in North American forests and woodlands each year. The...
Sudden Oak Death Phytophthora ramorum Home 9 Tag: Sudden Oak Death 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 disease,...
Thousand Cankers Disease Geosmithia morbida Home 9 Invaders 9 Category: Forest Pests & Pathogens ( Page 2 ) Background Thousand cankers disease is a new threat that has been linked to the death of eastern black walnut trees in the United States...
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