Eriosoma lanigerum (Hausmann, 1802)

woolly apple aphid, American blight

on Ulmus, primary host plant

gall

In the older literature it was assumed that this species also, or perhaps originally, occurs in North America and there passes a spring generation on elm. Currently this vision is considered uncertain. In most parts of Europe the species lives permanently on its secondary host.

host plants

Ulmaceae, monophagous

Ulmus americana.

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on Rosaceae, secondary host plants

Crataegus monogyna, Dronten, 5.vi.2019 © Arnold Grosscurt

Malus domestica, Dronten, 1.vii.2019 © Arnold Grosscurt: colony on a leaf

Malus domestica, Dronten, 11.viii.2019 © Arnold Grosscurt: remnants of a colony, some dead aphids on a galled twig.

Malus domestica, Hungary, Mosonamgyaróvár, 8.vi.2012 © László Érsek: colony

preferent location of a colony

often on thick branches

detail of a colony

With each moult the mass of wax threads is lost and the aphids are ‘nude’.

gall

aphids in wax-protected colonies in crevices and bark wounds. Th branches may become disfigured by canker-like swellings. In orchards it is a serious pest.

host plants

Rosaceae, oligophagous

Amelanchier; Cotoneaster horizontalis; Crataegus; Cydonia oblonga; Malus domestica, sylvestris; Prunus “communis”, domestica, dulcis; Pyracantha coccinea; Pyrus communis, nivalis; Sorbus.

synonyms

Myzoxylus laniger.

references

Barbagallo, Binazzi, Pennacchio & Pollini (2011a), Barbagallo & Massimino Cocuzza (2014a), Bellmann (2012a), Blackman & Eastop (2014), Börner & Franz (1956a), Braggion (2013a), Buhr (1964b, 1965a), Danielsson (1979a), Dauphin & Aniotsbehere (1997a), Deckert & Deckert (2016a), Heie (1980a), Hellrigl (2004a), Houard (1908a), Japoshvili & Hansen (2014a), Lambinon, Carbonnelle & Claerebout (2015a), Lambinon & Schneider (2004a), Lampel & Meier (2003a), Nieto Nafría, Carnero Hernández & Mier Durante (1977a), Nieto Nafría, Mier Durante, Binazzi & Pérez Hidalgo (2002a), Petrović (1998a), Redfern & Shirley (2011a), Ripka, Reider & Szalay-Marzsó (1998a), Roskam (2009a), Tambs-Lyche & Heie (1994a), Tavares (1905a), Wojciechowski, Depa, Halgoš ao (2016a).