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.
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.
Scab and rust diseases are caused by fungi that invade crabapple, apple, hawthorn, common pear, and other ornamental plants in the rose family.
Oak Wilt is a serious disease of oak trees. red oaks are much more susceptible than white and bur oaks.
The disease affects mostly non-native pines such as Austrian, Japanese black and Scotch. Diseased trees die in two waves.
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.
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.
This disease of peach and nectarine leaves can infect your tree annually in the spring before or just after bud break.
Obscure scale is a serious pest of oaks, especially pin and willow, that causes trees to develop a sparse, unhealthy appearance with small, off-color leaves.
Oak wilt is an aggressive, tree-killing disease of oaks. It affects oaks in a manner similar to how dutch elm disease affects elms. The fungus enters the water-conducting vessels of the sapwood through fresh wounds or through roots connecting healthy and diseased trees.