Canadian Forest Service Publications
Cooley spruce gall aphid. 1977. Wood, C.S. Government of Canada. Department of the Environment. Canadian Forest Service, Pacific Forest Research Centre, Victoria, BC. Forest Pest Leaflet 06. 4 p.
Issued by: Pacific Forestry Centre
Catalog ID: 1705
Availability: PDF (download)
Forest Pest Leaflets are a series of about eighty publications dealing with insects, tree diseases, and other problems affecting the growth, survival, and general health of forests. Each leaflet explains the distribution of these pest, the damage they cause, how to identify them, and the control options that may be available.