SPRUCE SPIDER MITES. Spruce spider mites are “cool season”
mites commonly found feeding on fir, arborvitae, spruce,
Douglas-fir, and other conifers. Their sucking mouthparts cause
bleaching, yellowing, stippling or bronzing of the needles.
Spruce Spider Mite Pictures from USDA Forest Service - Region 4 Archive, USDA Forest Service, Bugwood.org
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