The wax-covered brown eggs are clustered near females. There are several generations per year. After overwintering as immatures on the bark, adelgids begin feeding and secrete large amounts of waxy material over their bodies. When mature, females lay eggs. Crawlers and winged individuals emerge from these eggs.
Wingless forms settle on the tree and reproduce repeatedly.
Healthy trees are not usually affected by the pine bark adelgid, and light to moderate infestations don't usually warrant control. If unsightly, the adelgids and wool can sometimes be washed off with water, using a strong stream from a garden hose or insecticides can be applied if desired. Drooz, A.T. 1985. Insects of Eastern Forests . USDA Forest Service Miscellaneous Publication 1426.