Abstract
Parasitoids emerged from the alfalfa weevil, Hypera postica were surveyed. The weevils at fourth instar or in cocoons were collected from their legume host plants including Astragalus sinicus, Vicia angustifolia, Medicago polymorpha, and Medicago lupulina at eight sites in Kagoshima Prefecture, Japan, from 1989 to 1995. All parasitoids emerged after the pupation of the weevils. Eleven species of parasitoids were identified: nine ichneumonids, Agrothereutes grapholithae, Itoplectis alternans epinotiae, I. naranyae, Gnotus hyperae, Bathythrix kuwanae, Gelis asozanus, Scambus (Ateleophadnus) inouei, S. (Scambus) rubrigaster, and Bathyplectes sp.; one chalcid, Brachymeria (Brachymeria) funesta; and one tachinid, Bessa paralella. Parasitism was 0.47% for the fourth instar (n = 4,924) and 3.66% for those in the cocoon (n = 4,401), in samples collected from 1989 to 1995. Itoplectis naranyae, I. alternans epinotiae and B. paralella were predominant species.
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