Spruce beetle (Dendroctonus rufipennis) is the most damaging insect in Alaska’s forests. This native insect is always present in our spruce forests and has a notorious history for Alaska forest landowners.

The European spruce bark beetle (Ips typographus) is a species of beetle in the weevil subfamily Scolytinae, the bark beetles, and is found in Europe, Asia Minor and east to China, Japan, North Korea and South Korea.

Spruce beetles (Dendroctonus rufipennis) are native bark beetles that infest Engelmann spruce (Picea engelmannii) and occasionally Colorado blue spruce (P. pungens) in high elevation forests in Colorado.

The spruce beetle creates spruce snags of various sizes, preferring to attack and kill large trees, but during outbreaks killing all sizes of trees down to small saplings. Snags tend to occur in a clustered pattern unless host trees have a scattered distribution.

Dendroctonus rufipennis, the spruce beetle, is a species of bark beetle native to British Columbia, Newfoundland and Labrador, Nova Scotia, Ontario, Quebec, Northern Manitoba, the Yukon, Alaska, Colorado, Wyoming, Montana, and Maine.

Damage—The spruce beetle, Dendroctonus rufipennis, is the most significant natural mortality agent of mature spruce. Outbreaks have occurred in spruce forests from Alaska to Arizona.

Species Profile: European Spruce Bark Beetle. Destructive pest of spruce (Picea spp.) that has caused extensive tree losses in Europe (CABI)

Spruce beetle is one of the most widespread native bark beetles in North America. Spruce beetle attacks large-diameter spruce trees with weakened defences, including recent windthrown and senescing trees, fresh stumps, and standing trees stressed by dry or cold soils, competition, insect defoliation, or disease. Populations of beetles that ...

The great spruce bark beetle is a non-native pest of spruce and pine trees (species in the Picea and Pinus genuses) which, if left uncontrolled, could cause serious damage to the...

The great spruce bark beetle damages spruce trees by tunnelling into the bark. This pest was accidentally introduced into the UK in 1982 and now has become established in Western England, Wales and Southern Scotland.