This study was conducted to determine the suscepti-bility of R. indifferens mature third instars to ®ve species of entomopathogenic nematodes: S. feltiae (Fil-ipjev), S. carpocapsae (Weiser), S. riobravis Cabanillas, Poinar, and Raulston, H. bacteriophora Poinar, and H. marelatus Liu and Berry. Infective juveniles (IJs) of these ®ve species of nematodes were produced in Galleria mellonella (L.) larvae using methods cited by Kaya and Stock (1997).