During visits, your arborist will keep your trees and shrubs protected by determining the overall health of your landscape, including insect infestation and the presence of mites. As plant health care professionals, our primary objective is to keep your trees and shrubs healthy, not to eradicate an entire population. If the number of insects or mites exceeds the level your plant can tolerate and still remain healthy, insect control through precise treatment and expert monitoring may be necessary.