Installing storm windows and doors before adult emergence is helpful. Use good night-light discipline, especially over doors and windows when adults are present. Use special yellow lights not attractive to insects. Insecticides Indoors, household pressurized aerosol sprays of pyrethrins, sprayed where adults are present, will give good kill. The use of a strong suction vacuum cleaner with proper attachments will quickly collect many adults that get into the house.
Egg laying occurs over several weeks when new leaves unfold from the bud.
Leaf growth and adult egg laying will depend on spring temperatures. Repeat applications are usually needed. Even though the number of galls can be reduced by properly timed sprays, the operation may be unpractical except on small hackberry trees. If necessary, commercial applicators can apply soil injections of systemic insecticides such as Dimethoate. Before using any insecticide, always read the label, and follow directions and safety precautions.