gall wasp gall on the stem of a poplar leaf- Does anyone know what species this could be?
No interactions present.
Does anyone know what species this could be?
There are also similar galls of P nigra and its hybrids:
A "pouch" gall on one side of the petiole - caused by the aphid Pemphigus bursarius;
and two types of "spiral" gall
If 2-3 twists - P. spyrothecae
More than 3 twists - P. protospirae.
Take your pick!
Lat/Lng: 51.7225, -1.1318
OS grid ref: SP600029