Populus nigra, Hungary, Mosonmagyaróvár © László Érsek: young gall (early May)

opened gall with fundatrix

a month later

apterae

alatae

Populus nigra, Spain, prov. Léon, Astorga © Nicolás Pérez

Populus nigra cv ‘Italica’, Belgium, prov. Liège, Sclessin © Jean-Yves Baugnée.The gall is unusually high, possibly because it is still young.

opened gall

Populus nigra cv ‘Italica’, Overschie © Ben van As: the lower gall is about to burst open at the tip

gall

the gall usually is green and almost always narrowed at the base.

host plants

Salicaceae, narrowly monophagous

Populus laurifolia, nigra, tadshikistanica.

gall

aphid colonies on the roots.

secondary host plants

Fabaceae, oligophagous

Lathyrus pratensis; Medicago lupulina; Melilotus altissimus.

synonyms

Pemphiginus populi; Pemphigus hederae de Horváth, 1894.

references

Álvarez, Moreno‑González, Martinez, ao (2020a), Barbagallo, Binazzi, Pennacchio & Pollini (2011a), Barbagallo & Massimino Cocuzza (2014a), Béguinot (2002h, 2003a, 2006c, 2007a, 2012a), Bellman (2012a), Blackman & Eastop (2014), Blanes-Dalmau, Caballero-López & Pujade-Villar (2017a), Buhr (1965a), Cogolludo (1921a), Dauphin & Aniotsbehere (1997a), Deckert & Deckert (2016a), Heie (1980a), Hellrigl (2004a), Houard (1908a, 1909a), Influential Points (2018), Kollár (2011a), Lambinon, Carbonnelle & Claerebout (2015a), Lambinon & Schneider (2004a), Lampel (1988a), Lampel & Meier (2003a), Nieto Nafría, Mier Durante, Binazzi & Pérez Hidalgo (2002a), Osiadacz & Halaj (2014a), Pellizzari (2010a), Pérez Hidalgo, Martínez Peláez & Nieto Nafría (2001a), Redfern & Shirley (2011a), Ripka, Reider & Szalay-Marzsó (1998a), Suay Cano & González Funes (1998c), Tavares (1905a), Tomasi (2003a, 2014a), Wojciechowski, Depa, Halgoš ao (2016a).