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The plant pathogenic fungus Leucostoma kunzei (formerly Valsa kunzei) is the causal agent of Leucostoma canker (also known as Cytospora canker or spruce canker), a disease of spruce trees found in the Northern Hemisphere, predominantly on Norway spruce (Picea abies) and Colorado blue spruce (Picea pungens).
Albert donated a 74-foot Norway spruce tree from the couple's yard to be the 2024 Rockefeller Center Christmas tree. Albert told NBC’s Joe Fryer that he and his wife, Leslie, planted the Norway ...
The aphids can cause stunted growth in trees with heavy infestations rendering badly damaged trees unsellable. [1] Other species of adelgids also infest fir trees, those include the pine bark adelgid, the Cooley spruce gall adelgid (Adelges cooleyi), and the eastern spruce gall adelgid (Adelges abietis). [3] Another serious pest are bagworms ...
The blue spruce (Picea pungens), also commonly known as Colorado spruce or Colorado blue spruce, is a species of spruce tree native to North America in Arizona, Colorado, Idaho, New Mexico, Utah and Wyoming. [4] It is noted for its blue-green colored needles, and has therefore been used as an ornamental tree in many places far beyond its native ...
The larger eight-toothed European spruce bark beetle is a serious pest of spruce trees. Skip to main content. 24/7 Help. For premium support please call: 800-290 ...
Large burl on a spruce tree at Denali State Park, Alaska. A burl results from a tree undergoing some form of stress.It may be caused by an injury, virus or fungus. [1] Most burls grow beneath the ground, attached to the roots as a type of malignancy that is generally not discovered until the tree dies or falls over.
Picea glauca (Moench) Voss., the White Spruce, [4] is a species of spruce native to the northern temperate and boreal forests in Canada and United States, North America.. Picea glauca is native from central Alaska all through the east, across western and southern/central Canada to the Avalon Peninsula in Newfoundland, Quebec, Ontario and south to Montana, North Dakota, Minnesota, Wisconsin ...
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