Pest description and damage Females are semiglobular (roughly 0.3 inch in diameter), brown or reddish, and occur at the base of new shoots. They tend to be very inconspicuous, as they may be partly hidden by the bark and may resemble buds. Lower branches are infested heavily and may be killed, while upper branches are much less affected. Spruce bud scale produces a large amount of honeydew that is covered with black sooty mold. They infest various species of yew, and Alberta and Norway spruce.
For biology, life history, monitoring and management
Spruce (Picea)-Spruce bud scale
See "Scale insect" in:
See Table 1 in: