What is Causing Black Spots on My Maple Leaves?

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Have you noticed your maple tree leaves yellowing out, dropping or blue/black spots appearing on the leaves? These are all symptoms of a fungal infection called tar spot (Rhytisma spp.). The appearance of tar spot can be alarming to homeowners especially with newly planted trees in Dacula. It appears in early summer as unnoticeable light green and yellow spotting on the leaves. Later, the spots will turn a dark blueish-black and sometimes will be raised. The size of the spots depend on which type of pathogen affects the tree.

What can I do to prevent it?

Since tar spot is generally not harmful to the tree, the best thing to do is to rake away the leaves at the end of the season to prevent the spores in the ground from spreading and affecting other trees in the future. Any other maple trees in Dacula should also be raked in order for this method to be effective. Fungicides for trees in Dacula are also available to help treat the area, but are not recommended as the cost can outweigh the benefits.

If you have concerning trees on your property, call North American Tree Service to have a certified Arborist conduct a consultation today!

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North American Tree Service