Antibacterial activity against several Gram-positive and Gram-negative bacteria. Antifungal activity against A.fumigatus, B.cinerea, F.culmorum, F.oxysporum, N.crassa, C.albicans, C.neoformans and S.cerevisiae. Relatively abundant in head, thorax and to a lesser extent in abdominal carcass and anterior midgut. In young pupae, expressed within 2 hours of infection and continued to accumulate over 16 hours. By bacterial infection. Belongs to the cecropin family.