Certified arborists can put spray on your trees to control pests and keep them away from your beloved trees. Some homeowners have their trees injected with trunk and soil formula as well.
Spraying can be helpful for the health of your trees, but they have to be done correctly, or they can damage your tree even more. It is best to leave the job to a certified arborist who has a deep understanding of spraying and the right approach to it.