Scales may be controlled by applying horticultural oil, which is among the compounds registered for control of this pest in Connecticut. Consult the label for dosage rates and safety precautions. To detect the yellow crawlers, wrap black tape coated with Vaseline around small branches. Adult flights may be detected with pheromone traps. Sinuate peartree borer , Agrilus sinuatus.
Borers weaken shrubs, causing scars and sometimes completely girdling and killing shrubs.
Larvae that are partly grown overwinter in their tunnels in the wood for 2 consecutive years. Second-year larvae form pupae in April, and the adult beetles emerge about 1 month later in late May or June. The females lay eggs in the crevices and under the edges of the bark. In early July, the young grubs or larvae hatch from eggs and excavate narrow sinuous tunnels in the sapwood just beneath the bark. Larvae are only partly grown by the time winter arrives.