Acari: Eriophyoidea - gall mite Aceria pseudoplatani Photographs on Acer pseudoplatanus, Sycamore Host: Acer pseudoplatanus Upperside of leaf often yellowish, with or without a bulge. Lowerside erineum initially whitish becoming brown with age

Aceria pseudoplatani
Kingston Lacy, Dorset. August 2017