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.

hostplants

Ulmaceae, monophagous

Ulmus americana.


on Rosaceae, secondary host plants

Eriosoma lanigerum on Malus domestica

Malus domestica, Hungary, Mosonamgyaróvár © László Érsek: colony

Eriosoma lanigerum on Malus domestica

preferent location of a colony

Eriosoma lanigerum on Malus domestica

often on thick branches

Eriosoma lanigerum on Malus domestica

detail of a colony

Eriosoma lanigerum on Malus domestica

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

Eriosoma lanigerum gall

Malus spec., Belgium, Antwerp © Chris Snyers: gall

Eriosoma lanigerum old gall

old gall

gall

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

hostplants

Rosaceae, narrowly oligophagous

Amelanchier; Cotoneaster horizontalis; Crataegus; Cydonia oblonga; Malus domestica, pumila, sylvestris; Pyracantha coccinea; Pyrus communis, nivalis; Sorbus.

The reference to Prunus amygdalus and “communis” by Dauphin & Aniotsbehere must be a mistake.

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), Lambinon, Carbonelle & Claerebout (2015a), Lambinon & Schneider (2004a), Lampel & Meier (2003a), Redfern & Shirley (2011a), Ripka, Reider & Szalay-Marzsó (1998a), Roskam (2009a), Tambs-Lyche & Heie (1994a).

mod 11.xii.2017