Garden Tool Set

Acer Gall Mite - Aceria cephaloneus

Symptoms: The small red galls, shown in the photo to the left. They appear on the upper surface of the leaf.

Cause: Aceria cephaloneus mites suck the sap in the leaf, which induces the plant to react with the galls.

Control: There is no need to control this issue for the plant, as there is no harmful effect on the host. For small infestations the leaves can be removed, which will improve the look of the plant.