Pterocallis maculata (von Heyden, 1837)
green-barred alder aphid
on Alnus
Alnus glutinosa, UK © Bob Dransfield & Bob Brightwell, InfluentialPoints
parasite
Apterae 1-2 mm, in compact colonies at the underside of the leaves, preferably along the main veins. They are almost always attended by ants.
host plants
Betulaceae, monophagous
Alnus glutinosa.
Occasionally also on A. cordata.
references
Blackman & Eastop (2017), Börner & Franz (1956a), Durak, Durak & Borowiak-Sobkowiak (0000a), Heie (1892a), Łabanowski & Soika (2011a), López Rodríguez & Nieto Nafría (1983a), Nieto Nafría & Mier Durante (1981a, 1998a), Petrović (1998a), Piron (2017a), Ripka, Reider & Szalay-Marzsó (1998a, Stroyan (1977a), Wieczorek & Kanturski (2011a), Wojciechowski, Depa, Halgoš ao (2016a).