Flowers of Japanese honeysuckle,Lonicera japonicaThunb., were found to support larval populations of tobacco budworm,Heliothis virescens(F.), and corn earworm,Helicoverpa zea(Boddie), in southwestern Georgia and northern Florida. However, larvae were not detected in samples taken during 1990 in southeastern Oklahoma and eastern Texas. This discovery constitutes a new host record for bothH. virescensandH. zea.Studies conducted at 10 different sites in Tift County, Georgia, during 1988–1990 revealed thatH. virescenspopulations peaked on Japanese honeysuckle during the F1 generation of April through May and again during August through September.H. zealarval populations occurred principally during August through September. Peak F1 larval populations ofH. virescenson Japanese honeysuckle occurred at the same time as those on crimson clover,Trifolium incarnatumL., and wild geranium,Geranium carolinianumL. BothH. virescensandH. zealarvae were capable of developing on Japanese honeysuckle flowers in the laboratory. Although survivorship was lower,H. virescensalso developed on Japanese honeysuckle leaves and berries.Cardiochiles nigricepsViereck was the principal species parasitizingH. virescens; parasitism ofH. zeawas negligible andMicroplitis croceipes(Cresson) was the only species detected.M. croceipeswas the primary parasitoid ofH. virescensandH. zealarvae collected from crimson clover. Results of this study indicate that Japanese honeysuckle is an important early season host ofH. virescensand an important late-season host for bothH. virescensandH. zeawhen overwintering populations are developing.