Calophasia lunula is a species of noctuid moth known by the common names toadflax moth and toadflax brocade moth. It is used as an agent of biological pest control against yellow toadflax (Linaria vulgaris) and Dalmatian toadflax (Linaria genistifolia ssp. dalmatica) in areas where they are considered noxious weeds, such as in North America. This moth is native to Europe. It was first introduced to Canada as a biocontrol agent in the early 1960s, and to the United States shortly thereafter. The moth is now established in many areas. It tends not to establish as easily in colder climates.