Aceria dispar

Phytoptus dispar

Hosts: Populus tremula, nigra, tomentosa, tremuloides?

Relationship: Leaf rolling, deformed foliage at end of twigs; leaf rolling

Range: Europe; China; OR, WV

Aceria dispar (Nalepa, 1891

Type data. Populus tremula L. (Salicaceae); type locality not stated by the author. Amrine and Stasny (1994) listed Austria followed by a question mark.

Geographic distribution. Nearctic, Palaearctic.

Relation to the host plant. Gall-making mite. This species is associated with the upward rolling of both sides of young leaves towards the midrib. Often the leaves remain small, forming a distorted bunch-like mass.