Pest description and crop damage Females are semiglobular and brown and resemble buds. They produce abundant honeydew.
See "Spruce" in:
Christmas Tree Plantation Pests
Chemical Control of Nursery Pests
Spray in early summer when crawlers are present.
For more information
Johnson, W.T. and H.H. Lyon (1991), Insects That Feed on Trees and Shrubs, 2nd ed., Cornell University Press (p. 96).