Pemphigus populitransversus
Nogales
Santa Cruz County, Arizona
Coordinates: 31.360410, -110.936396
Elevation: 3,855 ft
April 11, 2022
Galls measured between 5 mm and 7 mm long
Found on two Cottonwood trees (Populus deltoides)
Determined by Salvador Vitanza
Confirmed by Joshua C’deBaca