You can use tree wraps to protect trees and shrubs from rodents. Your choice of material will depend on the animal causing the damage. Plastic wrap is the easiest to install but doesn’t hold up as well as metal mesh. Heavy plastic wrap will protect plants from most rodents. The size of the mesh opening is also important. If it’s too large rodents can get through it. You can also use tubes made out of solid plastic. Most garden stores and nurseries sell these products and should be able to advise you on the best selection for your area and for the particular trees and shrubs you’re hoping to protect.