Aceria dispar

The mite Aceria dispar causes galling of the leaves of Aspen (and possibly White Poplar).  The margins of the young leaves are rolled towards the midrib, usually affecting both sides.  It often affects many leaves, which become distorted and often bunched together. These leaf rolls contain mites.

Gall  Adult

Adult: Unless identified by a recognised expert, a photo is required and the specimen should be examined with a microscope. In the comments box, state the key or ID method used and describe the size and identifying characters.   Gall: Unless identified by a recognised expert, a photo is required. If the photo doesn't show the key ID features then in the comments box describe the size and identifying characters you have observed.

Areas where Aspen is found.

Galls can be seen when Aspen is in leaf.

True status in Britain is difficult to determine due to lack of records.

Status in Leicestershire and Rutland not known.