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Spruce Beetle

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.

PREVENTATIVE TREATMENTS:
     
MCH Bubble Caps, Preventative Spraying, Pheromone Baiting, Traps & Lures, ODC Colloidal Chitosan, Stand Thinning

FAQ's: pdf

RESOURCES:

Spruce Beetle USFS FIDL #127 pdf

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Sevin SL Carbaryl Insecticide, Bayer

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

Active Ingredients: Carbaryl 43.0%
Insecticide Mode of Action: 1A (Carbamates)
EPA Signal Word: CAUTION / PRECAUCION
Application Rate Range: (see label)
Container Size(s): 2.5 Gal.
From $121.45

Synergy Shield MCH Bubble Caps, Douglas-fir and Spruce Beetle Repellent

Synergy Shield MCH Bubble Caps, Douglas-fir Beetle Repellent uses MCH – a naturally occurring anti-aggregation pheromone of the Douglas-fir beetle to protect trees from attack by Spruce, and Douglas-fir beetles.

Active Ingredients: 3-methyl-2-cyclohexen-1-one 97.9% (500 mg)
EPA Signal Word: CAUTION / PRECAUCION
Application Rate Range: 1 or 2 /tree, 40 /acre
Container Size(s): Min. Order 10 pcs.
From $2.10

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