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dc.contributor.authorJacas Miret, Josep Anton
dc.contributor.authorPeña, Jorge E.
dc.contributor.authorDuncan, Rita E.
dc.description.abstractThe external morphology and development of the immature stages of Brachyufens osborni (Dozier) (Hymenoptera: Trichogrammatidae), a Nearctic solitary endoparasitoid of the eggs of Pachnaeus spp. (Coleoptera: Curculionidae), are reported. Under our laboratory conditions (25 C and a photoperiod of 12:12 [L:D] h),B. osbornireared in eggs of Pachnaeus litus (Germar) (Entiminae) had a developmental time of 14.7 d. Egg hatching occurred within 15 h from oviposition and mandible measurements indicated the existence of two instars. First instars were mymariform, whereas second instars were sacciform. Pupation occurred 5Ð 6 d after egg hatching and adults emerged 8 d later. On completion of the preimaginal development, the meconium was expelled and emergence took place by biting a hole in the chorion of the host egg. Both sexes emerged at the same time, and the sex ratio was female biased (3:1).ca_CA
dc.format.extent6 p.ca_CA
dc.publisherEntomological Society of Americaca_CA
dc.relation.isPartOfAnnals of the Entomological Society of America, 102, 1 , p. 112-118 (7)ca_CA
dc.rightsCopyright 2009 Entomological Society of Americaca_CA
dc.subjectPachnaeus litusca_CA
dc.subjectDiaprepes abbreviatusca_CA
dc.subjectbiological controlca_CA
dc.subjectegg parasitoidca_CA
dc.titleMorphology and Development of the Immature Stages of Brachyufens osborni (Hymenoptera: Trichogrammatidae), an Egg Parasitoid of Broad-Nosed Weevil Species (Coleoptera: Curculionidae)ca_CA

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