Our arborist advice section is the most extensive expert collection of tree, lawn and landscape care tips and educational resources that you will find anywhere.
Follow our winter checklist to keep your trees and landscape healthy by identifying potential issues.
The tender leaves of a wide variety of tree species are food for these leaf-chewing caterpillars, with elm, oak, and apple being favorites.
Common throughout the U.S. and Canada, these caterpillars feed on over 100 species of forest, fruit and shade trees. Some of the favored hosts include wild cherry, pecan, black walnut, persimmon, mulberry and sweetgum.
Fire blight is a leaf disease that attacks a variety of fruit trees and rosaceous ornamental trees.
Foamy bark canker disease is the newest discovered threat to coast live oak in California. The disease is vectored by the native western oak bark beetle and has been found in multiple counties in Southern California. It threatens to destroy southern California's coast live oak trees.
Girdling roots, which grow around another root or trunk, create pressure and “choke” or compress water and nutrient conductive tissues.
Classified as one of the most destructive insects in the United States, the gypsy moth partially or completely strips a host tree of its leaves.
The hemlock woolly adelgid is a serious pest of Canadian hemlock in the eastern United States and of western hemlock used as an ornamental in the Pacific Northwest.
Most Ips beetle problems occur on newly transplanted pines or plants under stress. Prolonged drought can increase Ips beetle infestations.
Don’t let their brown halo trace misguide you—Japanese beetles are no angels. They do have wings though, and can chew their way through your trees and landscape quickly. This summer, keep your trees and shrubs healthy with these tips from your local, licensed Davey tree service professional.