However, the felled tree will be attacked for its entire length and will therefore absorb from 4 to 6 times the number of beetles. The use of trap trees is restricted to situations where they can be removed for milling within a year of infestation. A recommended practice is to fell trap trees around the perimeter of salvage or control area in advance of logging. They should lie on the ground shaded by the overstory. Trap trees are useful in augmenting other methods of reducing spruce beetle populations.
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Mortality from spruce beetle. Spruce beetle adult and larval galleries. Spruce beetle, Dendroctonus rufipennis . Spruce beetle adult and boring dust. Salvaging white spruce killed by spruce beetle.