Pemphigus populinigrae (Schrank, 1801)
on Populus, primary host plant
Populus x canadensis, Zwolle, 10.vi.2019 © Arnold Grrosscurt<
same leaf, underside
Populus nigra, Spanish Pyrenees, Huesca © Ben van As
gall
epiphyllous, generally bright red, fusiform-globular swelling of the central part of the midrib, to almost the size of a hazelnut; slit-like opening at the underside only over a part of the length of the gall.
host plants
Salicaceae, monophagous
Populus alba, balsamifera, x erolinensis, x canadensis, carolinensis, laurifolia, nigra & var italica.
on Filago, Gnaphalium, secondary host plant
Gnaphalium uliginosum, Belgium, prov. Namur, Wiesme, Bois du Roi; © Jean-Yves Baugnée
gall
aphids preferably in the indumentum of the inflorescence. The wingless aphids here are 2 mm long, yellowish green with white wax-wool.
host plants
Asteraceae, narrowly oligophagous
Filago arvensis, germanica, lutescens; Gnaphalium sylvaticum, uliginosum.
synonyms
Pachypappa populinigrae; Pemphigus filaginis (Boyer de Fonscolombe, 1841).
parasitoids, predators
references
Álvarez, Moreno‑González, Martinez, ao (2020a), Barbagallo, Binazzi, Pennacchio & Pollini (2011a), Béguinot (2003a, 2006c, 2012a), Bellmann (2012a), Blackman & Eastop (2014), Blanes-Dalmau, Caballero-López & Pujade-Villar (2017a), Börner & Franz (1956a), Buga, Zhorov, Leshchinskaya & Stekolshchikov (2016a), Buhr (1965a), Burton, Carbonnelle, Ellis & Schneider (2019a), Chinery (2011a), Coulianos & Holmåsen (1991a), Danielsson (1974a), Dauphin & Aniotsbehere (1997a), Deckert & Deckert (2016a), Docters van Leeuwen (1936a), Ecott (2012a), Ferrer-Suay, Selfa, Mata-Casanova, ao (2018a), Heie (1980a), Houard (1909a), Ilie & Marinescu (2011a), Kollár (2011a), Lambinon, Carbonnelle & Claerebout (2015a), Lambinon & Schneider (2004a), Lampel & Meier (2003a), Nieto Nafría, Mier Durante, Binazzi & Pérez Hidalgo (2002a), Osiadacz & Halaj (2014a), Petrović (1998a), Rakauskas & Trukšinaitė (2011a), Redfern & Shirley (2011a), Roskam (2009a), Suay Cano & González Funes (1998c), Tambs-Lyche & Heie (1994a), Wojciechowski, Depa, Halgoš ao (2016a).