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Cooley Sruce Gall Aphid

Colin Wood

Introduction

Adelges cooleyii is a common pest of spruce and Dougles-Fir trees in most areas of British Columbia.

On spruce, the typical damage is the unsightly, cone-like galls formed on the tips of the new growth.

on Dougles-Fir , the aphids cause discoloration and distortion of the new foliage, which can be of economic importance.

For more information, see the Cooley Sruce Gall Aphid Forest Pest Leaflet in the Canadian Forest Service bookstore.