...is a multivoltine species. Summer galls occur in the leaf axils of Symphyotrichum lanceolatum ... These galls are green, tightly compacted in the leaf axil with one larva per gall.
”- JD Plakidas: (2016) The Gall Midges (Diptera: Cecidomyiidae: Cecidomyiinae) From Allegheny County Pennsylvania©