How-To Features Tree Registry Register your trees for customized advice. Custom Care Kits Different trees have different needs. Despite its common name, the Spruce spider mite feeds on more than 40 species of conifers. The mites have a similar appearance to those already discussed.
Coloration varies from green to deep olive to brownish red.
Close inspection of the needles will reveal tiny white flecks and speckles where the mites have fed. Prolonged feeding causes yellowing, browning, and premature needle drop, often originating from the canopy interior. Infested foliage may also display webbing, eggs and cast skins. Heavy attacks can cause branch dieback or death of the plant. It overwinters in the egg stage attached to the base of needles or on the bark.