Insect Pests of Spruce - Cooley spruce gall adelgid

Gall on Colorado Blue spruce caused by the Cooley spruce gall adelgid, Adelges cooleyi.

Adelges cooleyi on Douglas fir needles.

Yellow spots on the top-side of Douglas fir needles infested with Adelges cooleyi.

Management of Cooley spruce gall adelgid

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 Photos courtesy of
U.S. Forest Service,
Forest Health Protection Unit
CUES URL:http//www.entomology.umn.edu/cues/dx/sk/spruce5.htm
Last Revised: December 7, 1998
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