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 Category: Invaders ( Page 7 ) 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 Category: Invaders ( Page 7 ) 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 Phytophthora ramorum Home 9 Category: Invaders ( Page 7 ) 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 Category: Invaders ( Page 7 ) 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...
Hemlock Woolly Adelgid Adelges tsugae Home 9 Category: Invaders ( Page 7 ) Background The hemlock woolly adelgid (HWA) is an aphid-like insect that attacks and kills hemlock trees by feeding on nutrient and water storage cells at the base of needles. It...
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