Ostrinia scapulalis, the adzuki bean borer or adzuki bean worm, is a species of moth in the family Crambidae. It was described by Francis Walker in 1859. It is one of 20 moths in the genus Ostrinia and is of Eurasian origin. The larvae have a gray mid-dorsal line and can be light pink or beige. The adult adzuki bean borer has a yellowish-brown forewing with jagged lines and variable darker shading, with a wingspan that ranges from 20 to 32 mm. The moths of this species are nocturnal and tend to be attracted to light.