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 Spruce spider mite (Oligonychus ununguis) occurs on all conifers (trees with evergreen needles and cones line pine, spruce, and fir) and is the spider mite most likely to cause damage on landscape conifers. See the spider mite page for a general description of how spider mites damage plants and options for control.
Spruce spider mite passes the winter months in the egg stage whereas other spider mites spend the winter as adults. This is important because it means that spruce spider mites can be monitored, and controlled, during the winter by targeting mite eggs. See the printable Guide, below, for details.
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Spruce spider mite damage on Douglas-fir needles. Damage is called "stippling"
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