Unaspis euonymi (Comstock, 1881)

euonymus scale

mainly on Euonymus, etc.

Unaspis euonymi on Euonymus europaeus

Euonymus europaeus, Belgium, prov. Namur, Namur, Mundo, 16.vi.2018 © Stéphane Claerebout: severe infestation

Unaspis euonymi: scales on Euonymus europaeus


Unaspis euonymi on Euonymus europaeus

Euonymus europaeus, Hungary, Mosonmagyaróvár © László Érsek

Unaspis euonymi: male scales on Euonymus europaeus

male scale

Unaspis euonymi: male scale on Euonymus europaeus

a single specimen

Unaspis euonymi: female scale on Euonymus europaeus

a female scale

Unaspis euonymi: crawler

a still mobile larva (“crawler”)

Unaspis euonymi: galls on Euonymus europaeus

Euonymus europaeus, France, dép. Nord, Zuydcote © Sébastien Carbonnelle

Unaspis euonymi: males on Euonymus europaeus

male specimens


Female scales are relatively larve, dull-brown and cup-shaped; the sit mainly on the branches. Males are much smaller and occur mainly at the underside of leaves; they are covered by an elongated white shield that his three length-ridges.

host plants

Celastraceae etc., polyphagous

Aspidistra elatior; Cistus; Euonymus europaeus, japonicus, latifolius; Laurus nobilis; Pachysandra; Phoenix canariensis.

Euonymus japonicus is the most important host plant by far.


Native in SE Asia; currently a pest species in North America, and an invasive in Europe.


Blay Goicoechea (1992a), Braggion (2013a), Fetykó (2014a), Hellrigl (2004a), Jansen (2009a), Kozár, Guignard, Bachmann ao (1994a), Malumphy (2010a, 2016a), Malumphy & Kahrer (2011a), Mifsud, Mazzeo, Russo & Watson (2014a), Pellizzari, Porcelli, Seljak & Kozár (2011a), Redfern & Shirley (2011a), Roques, Cleary, Matsiakh & Eschem (2017a), Salisbury, Malumphy & Halstead (2013a), Seljak (2010a), Özyurt & Ülgentürk (2007a).

mod 4.iv.2019