Spraying the boxelder bugs on the trees before they migrate in the fall is the best method of control. Spraying full-sized trees can be costly and requires proper equipment. When the insects congregate on houses, spray the sides and foundation of the house and a three-foot strip around the house. Apply the spray when bugs are observed congregating on the outside of the dwelling, especially in the fall. Insecticidal soaps are generally a good choice for control of such congregating bugs.
Insecticides are poisonous.
Read and follow label directions carefully. John C. Nye, Dean and Director. Distributed in furtherance of Acts of Congress of May 8 and June 30, 1914. It is the policy of the Delaware Cooperative Extension System that no person shall be subjected to discrimination on the grounds of race, color, sex, disability, age, or national origin.