12/19/2023 0 Comments Tamukeyama japanese maple picturesProper annual pruning, cleaning up of fallen leaves and twigs, and yearly replacement of mulch will help prevent the infection and spread of these Japanese maple tree diseases. Again, mature Japanese maple trees will probably recover but young trees may not. Moist, sunken bruising on leaves is a sign of anthracnose. It sometimes affects only one side of the tree, leaving the other looking healthy and normal. It is a soil dwelling fungus with symptoms that include yellowing leaves that fall prematurely. Verticillium wilt is another common Japanese maple disease. A mild case of canker will resolve itself, but heavy infection will kill the tree. The most common Japanese maple diseases are caused by fungal infection. A strong spray of water and regular treatment with either chemical or organic pesticides will go a long way to prevent insect problems with Japanese maples. At worst, they can cause the death of branches or even the tree itself by girdling the limb with their tunnels. These pests drill into the bark and tunnel along the trunk and branches. Aphids suck plant sap from the tree and a large infestation can cause distortions in tree growth. Wilting leaves, or leaves that are curled and puckered, may be a sign of another common Japanese maple pest: aphids. They often produce a honeydew which attracts another Japanese maple problem, sooty mold. All of these pests present as tiny bumps or cottony dots on twigs and on leaves. While these Japanese maple pests can attack a tree of any age, they are usually found in young trees. Other Japanese maple pests are scale, mealybug, and mites. These leaf feeders can destroy the looks of a tree in a matter of weeks. This tree has a mounding habit so its ultimately wider than it is tall, creating a draping. The most common Japanese Maple pests are the Japanese beetles. red bark and weeping form are a standout all on their own. There are several possible insect problems with Japanese maples.
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