The larvae feed on Potamogeton species. Young larvae mine the leaves of their host plant. Older larvae make a portable case of leaf fragments and feed externally. Full-grown larvae reach a length of 13–18 mm. The body and head and pale brown. Pupation takes place in the larval case. 1985: A systematic study of the Nymphulinae and the Musotiminae of Japan (Lepidoptera: Pyralidae). Scientific Reports of the Kyoto Prefectural University Agriculture, Kyoto 37: 1–162. Abstract and full article.
