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.

Identification difficulty

Adult Gall

Recording advice

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.

When to see it

Galls can be seen when Aspen is in leaf.

UK Status

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

VC55 Status

Status in Leicestershire and Rutland not known.

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Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map