The Cudweed (Cucullia gnaphalii) is a moth of the Noctuidae family. It is found from most of Europe (except Ireland and most of the Balkan Peninsula) to Turkey, Transcaucasia, Mongolia and Sayan. The wingspan is 38–46 mm. Adults are on wing from May to July. There is one generation per year. The larvae feed on the flowers and leaves of Solidago virgaurea, Solidago canadensis, Artemisia absinthium and Artemisia vulgaris. The species overwinters in the pupal stage, in a tough earthen cocoon usually among surface debris or sometimes underground.