An insight in the reproductive biology of Therophilus javanus (Hymenoptera, Braconidae, and Agathidinae#), a potential biological control agent against the legume pod borer (Lepidoptera, Crambidae)

Aboubakar Souna Djibril, Bokonon Ganta Aimé, Ravallec Marc, Cusumano Antonino, Pittendrigh Barry Robert, Volkoff Anne-Nathalie, Tamo Manuele. 2017. An insight in the reproductive biology of Therophilus javanus (Hymenoptera, Braconidae, and Agathidinae#), a potential biological control agent against the legume pod borer (Lepidoptera, Crambidae). Psyche, 2017:3156534, 8 p.

Résumé : Therophilus javanus is a koinobiont, solitary larval endoparasitoid currently being considered as a biological control agent against the pod borer Maruca vitrata, a devastating cowpea pest causing 20–80% crop losses in West Africa. We investigated ovary morphology and anatomy, oogenesis, potential fecundity, and egg load in T. javanus, as well as the effect of factors such as age of the female and parasitoid/host size at oviposition on egg load. The number of ovarioles was found to be variable and significantly influenced by the age/size of the M. vitrata caterpillar when parasitized. Egg load also was strongly influenced by both the instar of M. vitrata caterpillar at the moment of parasitism and wasp age. The practical implications of these findings for improving mass rearing of the parasitoid toward successful biological control of M. vitrata are discussed.

Mots-clés Agrovoc : agent de lutte biologique, lutte biologique, ovariole, Maruca vitrata, Vigna unguiculata, Braconidae, parasitoïde, élevage en masse, Maruca, niébé, ponte

Mots-clés géographiques Agrovoc : Bénin, Afrique occidentale, Afrique

Mots-clés libres : Therophilus javanus, Agathidinae, Maruca vitrata, Koinobiont, Cowpea pests

Agences de financement hors UE : Bill and Melinda Gates Foundation

Auteurs et affiliations

• Aboubakar Souna Djibril, Université de Montpellier (FRA) ORCID: 0000-0002-4867-2311
• Bokonon Ganta Aimé, UAC (BEN)
• Ravallec Marc, INRA (FRA)
• Cusumano Antonino, WUR (NLD)
• Pittendrigh Barry Robert, MSU (USA)
• Volkoff Anne-Nathalie, INRA (FRA)
• Tamo Manuele, IITA (BEN)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/613713/)

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