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.
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This disease commonly occurs on the southern landscape plant, red tip photinia. It also defoliates Indian hawthorn, loquat, flowering and fruiting pear, hawthorn and firethorn.
Don’t be fooled by their pencil point size, these brown to black beetles are not trivial pests. A significant beetle attack can destroy a tree within a few weeks.
The disease affects mostly non-native pines such as Austrian, Japanese black and Scotch. Diseased trees die in two waves.
Oak Wilt is a serious disease of oak trees. red oaks are much more susceptible than white and bur oaks.
Scab and rust diseases are caused by fungi that invade crabapple, apple, hawthorn, common pear, and other ornamental plants in the rose family.
Scale insects are small, highly modified animals that have little resemblance to most insects. Because of their small size and often cryptic appearance, large numbers may be present without being noticed.
Strange, irregularly shaped brown splotches clearly don’t belong on shiny, green tree leaves. Anthracnose is a disease that commonly causes these unsightly spots. Prevent and correct the problem with some tree TLC.
European Crane Fly
The tender leaves of a wide variety of tree species are food for these leaf-chewing caterpillars, with elm, oak, and apple being favorites.