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. Milder cases can cause scarring.Ī 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. The most common Japanese Maple pests are the Japanese beetles. There are several possible insect problems with Japanese maples. There are a few Japanese maple diseases and several insect problems with Japanese maples that you should be aware of to give your tree the care it needs. Its red, lacy leaves are a welcome addition to any garden, but they aren’t problem free. A Japanese maple is a glorious specimen tree.
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