Abstract
The alfalfa weevil,Hypera postica(Gyllenhal) (Coleoptera: Curculionidae), can severely damage the first cutting of alfalfa,Medicago sativaL. (Fabaceae), in much of Iran. The pest has been parasitized by several parasitoids includingOomyzus incertus(Ratzeburg) (Hymenoptera: Eulophidae), a gregarious larval endoparasitoid. This wasp can parasitize up to 30% of weevil larvae in alfalfa fields in northern Iran. It produces three to four generations per year, and the female prefers the fourth instar of the host for oviposition. Each female lays 2 to 22 eggs per host, which hatch within 47–60 h. The life cycle is completed in about 2 weeks, upon pupation inside the host. This species is predominantly present during the summer months in alfalfa fields (Streams and Fuester 1967).
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