Plant Parasites of Europe

leafminers, galls and fungi

Pemphigus phenax

Pemphigus phenax Börner & Blunck, 1916

on Populus

Pemphigus phenax: galls on Populus x canadensis

Populus x canadensis, Dronten, 14.v.2020 © Arnold Grosscurt

Pemphigus phenax: gall on Populus x canadensis

upper side

Pemphigus phenax: gall on Populus x canadensis

same leaf underside

Pemphigus phenax: gall on Populus x canadensis

opened gall with aptera

Pemphigus phenax: aptera


Pemphigus phenax: aptera

freshly moulted aptera


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


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


Buhr describes this species under the name: “Pemphigus dauci Gour.”. This is erroneous: P. dauci (Goureau, 1867) is a synonym of Dysaphis crataegi.


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).

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