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confirmed
Likely
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Host Plants
confirmed LikelyGray Alder
Alnus incana
Red Alder
Alnus rubra
Sitka Spruce
Picea sitchensis
Lodgepole Pine
Pinus contorta
Douglas Fir
Pseudotsuga menziesii
Western Red Cedar
Thuja plicata
Western Hemlock
Tsuga heterophylla
Pacific Silver Fir
Abies amabilis
Balsam Fir
Abies concolor
Grand Fir
Abies grandis
Balsam Fir
Abies magnifica
Shasta Red Fir
Abies magnifica var. shastensis
Mountain Alder
Alnus incana ssp. tenuifolia
White Alder
Alnus rhombifolia
Green Alder
Alnus viridis
Sitka Alder
Alnus viridis ssp. sinuata
Weeping Spruce
Picea breweriana
Engelmann Spruce
Picea engelmannii
Dwarf Pine
Pinus albicaulis
Knobcone Pine
Pinus attenuata
Bolander's Beach Pine
Pinus contorta ssp. bolanderi
Shore Pine
Pinus contorta ssp. contorta
Tamarack Pine
Pinus contorta ssp. murrayana
Jeffrey Pine
Pinus jeffreyi
Sugar Pine
Pinus lambertiana
Western White Pine
Pinus monticola
Bishop Pine
Pinus muricata
Ponderosa Pine
Pinus ponderosa
Monterey Pine
Pinus radiata
Foothill Pine
Pinus sabiniana
Coast Douglas Fir
Pseudotsuga menziesii var. menziesii
Mountain Hemlock
Tsuga mertensiana
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