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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 ...
Many pine trees turn yellow this time of year because of normal “needle drop” on the inside branches
The spruce beetle is the most serious pest of mature and overmature interior spruce in British Columbia; [8] small-diameter, rapidly growing trees were least susceptible to attack or death from spruce beetle, and the greater susceptibility of large-diameter, slowly-growing trees was more closely related to recent radial growth than to diameter. [9]
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 ...
In the 1940s, spruce bark beetle populations began to rise in the area of the Fraser Plateau. This killed many trees that were unable to be salvaged, and may have informed the decision to clearcut the future Bowron River outbreak. All known outbreaks of spruce bark beetle have accumulated in woody debris caused by logging or windthrow. [3]
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 ...