Eric R. Day, Virginia Polytechnic Institute and State University, Bugwood.org

Typical damage is to causes a stippling effect on the needles, causing them to loose color and turn yellow.

Eric R. Day, Virginia Polytechnic Institute and State University, Bugwood.org

Note the bare earth underneath the tree. This acts as a reflective heat source enhancing the mite problem.

USDA Forest Service - Region 4 - Intermountain , USDA Forest Service, Bugwood.org

note speckled foliage from feeding and presence of mites and fine webbing

USDA Forest Service - Region 4 - Intermountain , USDA Forest Service, Bugwood.org

spruce spider mite (Oligonychus ununguis) damage

USDA Forest Service - Region 4 - Intermountain , USDA Forest Service, Bugwood.org

spruce spider mite (Oligonychus ununguis) egg(s)

USDA Forest Service , Bugwood.org

spruce spider mite (Oligonychus ununguis) adult(s)

USDA Forest Service , Bugwood.org

spruce spider mite (Oligonychus ununguis) egg(s)

John Ruter, University of Georgia, Bugwood.org

spruce spider mite (Oligonychus ununguis) damage on Tibetan cypress (Cupressus torulosa var. gigantea)

Petr Kapitola, Central Institute for Supervising and Testing in Agriculture, Bugwood.org

spruce spider mite (Oligonychus ununguis) damage on Norway spruce (Picea abies)

Ward Strong, BC Ministry of Forests, Bugwood.org

Adult spruce spider mite with eggs on spruce needle

Ward Strong, BC Ministry of Forests, Bugwood.org

Young spruce (Picea glouca) with interior needles browned due to spruce spider mite.