Spruce beetle

Spruce Beetle, Dendroctonus rufipennis (Kirby),



The spruce beetle, Dendroctonus rufipennis (Kirby), is the most significant natural mortality agent of mature spruce. Outbreaks of this beetle have caused extensive spruce mortality from Alaska to Arizona and have occurred in every forest with substantial spruce stands. Spruce beetle damage results in the loss of 333 to 500 million board feet of spruce saw timber annually. More than 2.3 million acres of spruce forests have been infested in Alaska in the last 7 seven years with an estimated 30 million trees killed per year at the peak of the outbreak. In the 1990's, spruce beetle outbreaks in Utah infested more than 122,000 acres and killed more than 3,000,000 spruce trees. In the past 25 years, outbreaks have resulted in estimated losses of more than 25 million board feet in Montana, 31 million in Idaho, over 100 million in Arizona, 2 billion in Alaska, and 3 billion in British Columbia.

Spruce beetle outbreaks cause extensive tree mortality and modify stand structure by reducing the average tree diameter, height, and stand density. Residual trees are often slow-growing small and intermediate-sized trees which eventually become dominant.




Spruce Beetle USFS FIDL #127 pdf
Wood Boring Insects of Trees & Shrubs Wood Boring Insects of Trees & Shrubs



  • Preventative Treatments:
    Preventative Spraying (Permethrin, Bifenthrin, Carbaryl), Pheromone Repellents (MCH Bubble Caps/Flakes), Pheromone Traps & Lures





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Bifen XTS 25.1% Bifenthrin Insecticide, Control Solutions

Bifen XTS Bifenthrin insecticide provides long lasting protection against Mountain Pine and other Bark Beetles.

Active Ingredient: Bifenthrin 25.1%

Signal Word - WARNING / AVISO
From $39.95

Carbaryl 4L Insecticide (Sevin SL), Loveland Products

Carbaryl 4L Insecticide provides broad-spectrum control of more than 130 turf and ornamental pests.

Active Ingredient: Carbaryl 43.0%


From $125.95

MCH Douglas-fir and Spruce Beetle Repellent, Bulk

MCH Douglas-fir Beetle Repellent uses MCH – a naturally occurring anti-aggregation pheromone of the Douglas-fir beetle to protect living trees from attack by spruce and Douglas-fir beetles. It is also used to prevent the build-up of populations on logs, stumps, and fallen trees. MCH sends a message that the tree is full and that beetles should look elsewhere for a suitable host.

MCH Bubble Cap - Bulk qty. Min. Order 10 pcs.

FREE US Shipping, Canada $ 25
From $2.00

Astro Termiticide Insecticide, FMC

Astro Permethrin 36.8% Termiticide and Insecticide provides effective broad label control of over 100 insects.

Active Ingredients: Permethrin 36.8%
Insecticide Mode of Action Group: 3A
Insecticide Class:
Application Rate Range: (see label)
Container Size(s): 1 Gal.
From $70.95

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