Spruce Spider Mite
Problems with spider mites have declined in western North Carolina as more growers leave ground covers around their fields and refrain from using insecticides that aggravate mite problems. They can still develop into damaging populations, especially in dry years. Recognizing when a problem is starting is the key to keeping problems in check.
CTN 29: Spruce Spider Mite on Fraser Fir – fact sheet with life cycle, scouting and treatment thresholds, factors that increase mite problems, and controls
Focus on Mite Control – Information on cultural practices and miticides
Scouting for Christmas Tree Predators – including spider mite predators
Using Predatory Mites in Strawberries – has some great video of spider mite predators that are also found in Christmas trees