Objective: To investigate the extraction and antioxidant effects of flavonoids from male tussah moth. Methods: Flavonoids were ultrasonically extracted from male tussah moth with ethanol. The extract was analyzed qualitatively by UV-visible absorption spectroscopy. The optimum extraction conditions were determined by orthogonal array design. The antioxidant activity of flavonoids from male tussah moth investigated by comparing the reducing power and radical scavenging effects against DPPH, hydroxyl and supe...