The scales attack foliage, stems, and developing fruit, causing discoloration of the fruit and dieback of twigs and branches. With heavy infestations an overall loss of health causes entire trees to die. The overwintering stage is the second instar, which is fastened to the bark of the tree. With warming weather it resumes its growth and about the time the tree blossoms the mature males and females are present. Males emerge from under their wax scales to mate, and the females then begin to produce living nymphs, which emerge from under the female’s scale as the mobile crawler stage. Females will continue to produce young for about 6 weeks. The crawlers move to new locations and within a day insert their mouthparts into the tree, shed their skin to lose their legs and antennae, and form a new wax shell over themselves in this permanent location. They mature in around 2 months and up to 3 generations occur each year.
When the scale is detected on trees it is unlikely that it will resolve itself, and control efforts should be implemented. Dormant or summer oils may be effective, as well as contact insecticides applied when the first instar crawlers are present. An IGR applied when crawlers are present also may be effective.