Predation and Control
Natural predators, such as ladybirds/ladybugs, hoverfly and lacewing larvae, spiders and mites do reduce adelgid and aphid populations to some degree.4
Spraying against these adelgids with chemicals is possible, and can be done in either the fall or the early spring. Foliar treatments of carbaryl (Sevin) and permethrin have been most effective in Colorado State University trials. Horticultural oils, which have also been very effective, can cause temporary discoloration of spruce needles.2
Read more about this topic: Gall Adelgid
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