Dichrorampha bugnionana (Duponchel, 1843)
on Leucanthemopsis, Leucanthemum
The larvae bore in the base of the stem, often causing the death of the plant.
Thomann writes that the species often swarms around Achillea nana; possibly a third host plant?
distribution within Europe
Huemer (1993c), Lepiforum (2020), Thomann (1956a).