Late instar nymphs overwinter on the stems of host plants, with the female developing in the spring and begins egg production. From 150 to over 1000 eggs may be produced within the scale covering. A second generation may occur with adult females producing eggs in the fall. Nymphs in the crawler stage then appear in June and July. After 2 to 3 weeks the crawlers become sessile, feeding at one point and beginning to form the wax shell over themselves. There are 3 nymph stages prior to the adult stage.
Small infestations of the scale may not warrant a control program. A great many natural predators and parasitic insects have been discovered or introduced to combat this scale, and these help to keep populations below a threshold level. One of the bigger problems is the copious production of honeydew, which drips onto surfaces below and attracts ants and other sweet-feeding insects. Dormant oil applications to foliage and stems help kill the overwintering scales, and applications of contact insecticides timed to the emergence of the exposed crawlers will effectively kill them.