Large-scale yellow brown or reddish brown spots on leaves, which are easily recognized as mines; they are produced by the larvae of the Plane mining moth and develop on the lower leaf surface. They can be mistaken especially for plane anthracnose, which often occurs together with the moth. For a safe diagnosis, a leaf should be held against the light, and the mines can be seen easily. By use of a hand lens also the dark feces within the mine are showing. After hatching, the outer layers break off and the mined tissues become free.
Affected tree species
Nearly no damage, at most premature leaf shedding
Curative measures Control mostly not necessary; in special cases use of a skinning inhibitor (see Official Register of Plant Protection); with single standing planes collecting and removing the leaves in autumn can reduce the itensity of mines in the following year.
Plane mining moth: yellowing in the whole crown
Plane mining moth: mines of various size and condition, upper leaf surface
Plane mining moth: mines of various size and condition, lower leaf surface