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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Causes severe damage to forests and landscape pines, discoloring needles and eventually defoliation.
A fungus that discolors spruce needles and causes premature drop, especially in overly wet conditions.
Trees in decline have an unhealthy look. Often, leaves are fewer than normal and overall growth has been poor all season.
You want the best for your trees, and that includes making sure they are healthy. Here’s a great way to determine trees’ inner beauty.
Oak Wilt is a serious disease of oak trees. red oaks are much more susceptible than white and bur oaks.
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.
The tender leaves of a wide variety of tree species are food for these leaf-chewing caterpillars, with elm, oak, and apple being favorites.
Girdling roots, which grow around another root or trunk, create pressure and “choke” or compress water and nutrient conductive tissues.
This species is an armored scale with a hard, waxy covering. It damages hemlock needles by inserting needle-like mouth parts into leaf tissue and removing cell fluid.