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

opened gall with fundatrix, eggs, and young aphids

one month later

opened mature gall

apterae and alatae

Populus nigra cv. ‘Italica’, Utrecht, Terwijde © Arnold Grosscurt

gall

purse galls, always on the petiole.

host plants

Salicaceae, monophagous

Populus nigra.

Less often also on P. balsamifera, x berolinensis, canadensis, carolinensis, simonii.

on Asteraceae, secondary host plants

gall

aphid colonies, with much white wax, mainly on the roots.

host plants

Asteraceae, oligophagous

Bidens tripartitus; Cichorium endivia, intybus; Crepis; Lactuca muralis, sativa, serriola; Lapsana; Sonchus asper; Taraxacum; Tolpis succulenta; Tussilago.

synonyms

Pemphigus pyriformis, piriformis Lichtenstein, 1886.

notes

in summer sometimes a pest on lettuce.

references

Álvarez, Moreno‑González, Martinez, ao (2020a), Barbagallo, Binazzi, Pennacchio & Pollini (2011a), Barbagallo & Massimino Cocuzza (2014a), Béguinot (2002h, 2003a, 2006a, 2007b, 2012a), Bellmann (2012a), Blackman & Eastop (2014), Börner & Franz (1956a), Braggion (2013a), Buhr (1965a), Charles, Nef, Allegro, ao (2014a), Chinery (2011a), Cogolludo (1921a), Coulianos & Holmåsen (1991a), Dauphin & Aniotsbehere (1997a), Docters van Leeuwen (1936a), Franquinho Aguiar, Ilharco, Khadem & Moreira (2013a), Heie (1980a), Hellrigl (2004a, 2010a), Houard (1908a), Ilie & Marinescu (2011a), Influential Points (2018), Kollár (2007a, 2011a), Koops (2013a), Lambinon, Carbonnelle & Claerebout (2015a), Lambinon & Schneider (2004a), Lampel & Meier (2003a), Meliá Masiá (1986a), Mier Durante, Seco Fernández & Nieto Nafría (1989a), Müller & Horatschek (1980a), Nieto Nafría & Mier Durante (1981a), Nieto Nafría, Mier Durante, Binazzi & Pérez Hidalgo (2002a), Nieves Aldrey (1998a), Novgorodova & Stekolshchikov (2013a), Osiadacz & Halaj (2014a), Papapanagiotou, Nathanailidou, Taylor ao (2012a), Pellizzari (2010a), Pérez Hidalgo, Martínez Peláez & Nieto Nafría (2001a), Petrović (1998a), Redfern & Shirley (2011a), Roskam (2009a), Salas-Remón, Llimona, Lozano ao (2015a), Stănescu (2009a), Suay Cano & González Funes (1998c), Tambs-Lyche & Heie (1994a), Tavares (1905a), Tomasi (2012a, 2014a), Weis (1955a), Wojciechowski, Depa, Halgoš ao (2016a).