The most common problem, root-rot, comes when drainage is not good, especially in container grown trees. Maples are susceptible to the water molds, pythium and phytophthora, which are everywhere just like the common cold, but not a problem as long as your maple is in good health and has great drainage. Symptoms are the same as you would see in a tree in need of water; droopy leaves, a general look of poor health, and winter dieback. If your tree is in a container, you can get a conclusive diagnosis by de-potting and checking the roots. If root-rot is a problem the cambium will easily strip from the feeder roots. The cure is Phyton 27, available directly from the manufacturer at 1 (800) ELM TREE. I recommend a foliar spray as recommended by the manufacturer twice a year as a preventative for container grown maples, and as directed for landscape trees that show a problem.

Verticillium Wilt is also a problem that begins in the soil, and can devastate maples. It is usually associated with areas where plants of the nightshade family, tomatoes, potatoes and peppers have been grown, but can be brought in with plants purchased from a nursery. The most obvious symptom is the dying-back of several branches every winter, until half or more of the tree is affected, and the tree is lost. We have been recommending Phyton 27, available directly from the manufacturer at 1 (800) ELM TREE, to our customers, and have heard back a number of success stories. Marcie used it on a sick maple she had planted near her veggie garden with success. When more than half of the tree is dead, however, it is very hard to save it. If you have had this problem, it is best to avoid planting another maple in that spot. If you just HAVE TO have a maple there, drench the area well with Phyton-27 to kill the Verticillium before planting.

Maples that are vigorously growing may attract aphids in the early spring. These can usually be controlled by a good spray with the hose to physically dislodge the aphids in the tree, and a physical barrier to keep the ants out of your tree. I wrap a piece of saran wrap or aluminum foil around the trunk and apply Tangle-foot all the way around. Never apply Tangle-foot directly on the bark of your maple. If the problem persists, you may use Malathion as directed by the manufacturer. NEVER use Safer Soap on maples, it will defoliate them.