The Brown-winged knapweed Root Moth (Pterolonche inspersa) is a moth of the Pterolonchidae family. It is found in Portugal, Spain, France, Italy, Sardinia, the Czech Republic, Slovakia, Hungary, Bulgaria, Greece and Crete. It was released as a biological control agent for knapweed in Colorado, Montana, and Oregon and 1986, but there is no known establishment in the United States. The wingspan is about 20 mm. Adults are light-brown without distinct markings. There is one generation per year.