Pemphigus phenax Börner & Blunck, 1916
on Populus
Populus x canadensis, Dronten, 14.v.2020 © Arnold Grosscurt
upper side
same leaf underside
opened gall with aptera
aptera
freshly moulted aptera
gall
epiphyllous, generally reddish, fusiform swelling of the central part of the midrib, over five times the normal thickness; slit-like opening at the underside over almost the entire length of the gall.
primary hostplants
Salicaceae, monophagous
Populus nigra & var. italica.
on Daucus
gall
the apterae here are pale lemon yellow to yellowish white, with white wax; 1.5-2.5 mm.
secondary hostplants
Apiaceae, monophagous
Daucus carota & subsp. sativus
synonyms
Buhr describes this species under the name: “Pemphigus dauci Gour.”. This is erroneous: P. dauci (Goureau, 1867) is a synonym of Dysaphis crataegi.
references
Bellmann (2012a), Blackman & Eastop (2014), Buhr (1965a), Dauphin & Aniotsbehere (1997a), Heie (1980a), Krzywiec (1982a), Lampel & Meier (2003a), Nieto Nafría, Mier Durante, Binazzi & Pérez Hidalgo (2002a), Osiadacz & Halaj (2014a), Petrović (1998a), Redfern & Shirley (2011a), Tambs-Lyche & Heie (1994a).