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), Tomasi (2014a), Tavares (1905b).