Galls - (Aceria nalepai)

Galls - (Aceria nalepai)

Observation - Galls - (Aceria nalepai) - UK and Ireland. Description: On Alder, following the mid rib, cause a mite. 4th image showing leaf underside. Alder vein angle gall...

On Alder, following the mid rib, cause a mite.
4th image showing leaf underside. Alder vein angle gall...