Populus nigra italica, Goudswaard, 15.x.2014 © Ben van As

detail

the slit-like opening at the underside

gall

epiphyllous, generally yellowish-green, fusiform swelling of the median part of the midrib, nowhere thicker than four times the normal thickness; slit-like opening at the underside.

primary hostplants

Salicaceae, monophagous

Populus nigra & var. italica.

on Aethusa

gall

the wingless aphids here are 1-2 mm long, pinkish ochreous or pale straw-coloured.

secondary hostplants

Apiaceae, monophagous

Aethusa cynapium.

references

Bellmann (2012a), Blackman & Eastop (2014), Dauphin & Aniotsbehere (1997a), Heie (1980a), Influential Points (2018), Osiadacz & Halaj (2014a), Redfern & Shirley (2011a).