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Effects of different host species on the life history of Bracon hebetor

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Khalil, Muhammad Sajjad [UCL] Raza, Abu Bakar M. [Department of Entomology, University of Sargodha, 40100, Sargodha, Pakistan] Afzal, Muhammad [Department of Entomology, University of Sargodha, 40100, Sargodha, Pakistan] Aqueel, Muhammad A. [Department of Entomology, University of Sargodha, 40100, Sargodha, Pakistan] Khalil, Huma [UCL] Hance, Thierry [UCL]

Bracon hebetor (Hymenoptera: Braconidae) is a generalist idiobiont ecto-parasitoid that parasitizes a wide range of Lepidoptera and even some phylogenically distant weevil species (Coleoptera; Curculionidae). In the present context, our aim is to find the most suitable host for efficient laboratory rearing of B. hebetor. We compared fitness traits of this parasitoid wasp on five host species, four species belonging to the Lepidoptera, viz. Galleria mellonella (Pyralidae), Helicoverpa armigera and Spodoptera litura (Noctuidae), Sitotroga cerealella (Gelechiidae), and one to the Coleoptera, the alfalfa weevil Hypera postica (Curculionidae). We determined the parasitic potential, paralysis, daily oviposition rate, development time, total adult progeny, sex ratio and survival. Fecundity was followed during five consecutive days and oviposition period was determined, all under laboratory conditions. The best results were obtained on the wax moth larvae (G. mellonella) forwhich B. hebetor proved the highest biological activity in term of paralysis, parasitism and oviposition as compared to other tested host species. In Galleria mellonella, total eggs laid per female per five days and egg-adult survivorship were higher and sex ratio was highly biased toward females, as compared to Hypera postica. Intermediate biological activities were found on Helicoverpa armigera, Spodoptera litura and Sitotroga cerealella. These contrasting results show that the plasticity of this species could also represent an important fitness cost difference in performance, which is discussed in terms of phylogenetic distance of the host species (particularly Pyralidae). In conclusion, the possible application of these results can be used in the economically important field of biological control and improve storage of products affected by insect pests.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 2016
Language Anglais
Journal information "Animal Biology" - Vol. 66, no.3-4, p. 403-414 (2016)
Peer reviewed yes
Publisher Brill ((Netherlands) Leiden)
issn 1570-7555
e-issn 1570-7563
Publication status Publié
Affiliation UCL - SST/ELI/ELIB - Biodiversity
Keywords Biological control ; ectoparasitoid ; insect ; life history ; oviposition ; parasitism ; parasitoid ; pest ; 3123
Links
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Bibliographic reference Khalil, Muhammad Sajjad ; Raza, Abu Bakar M. ; Afzal, Muhammad ; Aqueel, Muhammad A. ; Khalil, Huma ; et. al. Effects of different host species on the life history of Bracon hebetor. In: Animal Biology, Vol. 66, no.3-4, p. 403-414 (2016)
Permanent URL http://hdl.handle.net/2078.1/186465