Trioza viridula (Zetterstedt, 1828)
on Cirsium
gall
the leaf disc with small depressions at the underside, and corresponding tiny bulges at the upperside. In each cavity one flat larva, encircled by a “nimbus” of wax threads.
host plants
Asteraceae, narrowly monophagous
Cirsium heterophyllum, oleraceum.
references
Buhr (1964b), Ossiannilsson (1972a, 1992a), Ouvrard (2014), Dauphin & Aniotsbehere (1997a), Houard (1909a), Seljak (2020a), Tomasi (2014a), Tavares (1905b).