The adult adelgid is slightly larger, and more plump than the nymph. She is also black though this is not readily apparent since she is covered with much longer white rods that resemble wool. The woolly covering can be pulled away from the insect. Though the adults do not move from the feeding site, they still have legs, which can be seen to move under a microscope. The eggs are laid in a clutch behind the females.
Eggs are oblong and cinnamon brown, like the crawlers.
Similar appearing problems . One of the most common are trees that have been improperly sheared to have multiple tops. This will often make the uppermost top appear weak and crooked. In addition, trees that are dying from Phytophthora root rot will often have weak tops, poor growth, and dead branches. Trees grown on extremely windy ridges, or with poor fertility, will sometimes have stiff trunks and red, hard reaction wood.