Plantago lanceolata
The caterpillars are known to feed primarily on "Succisa pratensis" and species of "Digitalis", "Plantago lanceolata", "Knautia arvensis", "Scabiosa succisa", "Scabiosa columbaria," "Veronica" ("Veronica dubravnaya", etc.), "Geranium", "Sambucus", "Gentiana", "Valeriana", "Lonicera implexa", "Filipendula", "Spiraea" and "Viburnum".