GEOFF KIDD / SCIENCE PHOTO LIBRARY GEOFF KIDD / SCIENCE PHOTO LIBRARY
Damaged walnut leaf. Underside of a walnut leaf (Juglans sp.). The brown area is a gall blister caused by the walnut leaf gall mite (Aceria erinoea). It is covered in a mass of tiny white hairs in which the mites live.
Model release not required. Property release not required.