Progeny fitness determines the performance of the parasitoid Therophilus javanus, a prospective biocontrol agent against the legume pod borer

Abstract Therophilus javanus (Bhat & Gupta) is an exotic larval endoparasitoid newly imported from Asia into Africa as a classical biological control agent against the pod borer Maruca vitrata (Fabricius). The parasitoid preference for the five larval instars of M. vitrata and their influence on...

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Autores principales:	Djibril Aboubakar Souna, Aimé Hippolyte Bokonon-Ganta, Marc Ravallec, Mesmin Alizannon, Ramasamy Srinivasan, Barry Robert Pittendrigh, Anne-Nathalie Volkoff, Manuele Tamò
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f07b52aa6bfa4b04a28637e93c5abcba
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spelling	oai:doaj.org-article:f07b52aa6bfa4b04a28637e93c5abcba2021-12-02T16:55:45ZProgeny fitness determines the performance of the parasitoid Therophilus javanus, a prospective biocontrol agent against the legume pod borer10.1038/s41598-021-88644-32045-2322https://doaj.org/article/f07b52aa6bfa4b04a28637e93c5abcba2021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-88644-3https://doaj.org/toc/2045-2322Abstract Therophilus javanus (Bhat & Gupta) is an exotic larval endoparasitoid newly imported from Asia into Africa as a classical biological control agent against the pod borer Maruca vitrata (Fabricius). The parasitoid preference for the five larval instars of M. vitrata and their influence on progeny sex ratio were assessed together with the impact of larval host age at the time of oviposition on development time, mother longevity and offspring production. In a choice situation, female parasitoids preferred to oviposit in the first three larval instars. The development of immature stages of the parasitoid was observed inside three-day-old hosts, whereby the first two larval instars of T. javanus completed their development as endoparasites and the third larval instar as ectoparasite. The development time was faster when first larval instars (two- and three-day-old) of the host caterpillars were parasitized compared to second larval instar (four-day-old). The highest proportion of daughters (0.51) was observed when females were provided with four-day-old hosts. The lowest intrinsic rate of increase (r) (0.21 ± 0.01), the lowest rate of increase (λ) (1.23 ± 0.01), and the lowest net reproductive rate (Ro) (35.93 ± 6.51) were recorded on four-day-old hosts. These results are discussed in the light of optimizing mass rearing and release strategies.Djibril Aboubakar SounaAimé Hippolyte Bokonon-GantaMarc RavallecMesmin AlizannonRamasamy SrinivasanBarry Robert PittendrighAnne-Nathalie VolkoffManuele TamòNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Djibril Aboubakar Souna Aimé Hippolyte Bokonon-Ganta Marc Ravallec Mesmin Alizannon Ramasamy Srinivasan Barry Robert Pittendrigh Anne-Nathalie Volkoff Manuele Tamò Progeny fitness determines the performance of the parasitoid Therophilus javanus, a prospective biocontrol agent against the legume pod borer
description	Abstract Therophilus javanus (Bhat & Gupta) is an exotic larval endoparasitoid newly imported from Asia into Africa as a classical biological control agent against the pod borer Maruca vitrata (Fabricius). The parasitoid preference for the five larval instars of M. vitrata and their influence on progeny sex ratio were assessed together with the impact of larval host age at the time of oviposition on development time, mother longevity and offspring production. In a choice situation, female parasitoids preferred to oviposit in the first three larval instars. The development of immature stages of the parasitoid was observed inside three-day-old hosts, whereby the first two larval instars of T. javanus completed their development as endoparasites and the third larval instar as ectoparasite. The development time was faster when first larval instars (two- and three-day-old) of the host caterpillars were parasitized compared to second larval instar (four-day-old). The highest proportion of daughters (0.51) was observed when females were provided with four-day-old hosts. The lowest intrinsic rate of increase (r) (0.21 ± 0.01), the lowest rate of increase (λ) (1.23 ± 0.01), and the lowest net reproductive rate (Ro) (35.93 ± 6.51) were recorded on four-day-old hosts. These results are discussed in the light of optimizing mass rearing and release strategies.
format	article
author	Djibril Aboubakar Souna Aimé Hippolyte Bokonon-Ganta Marc Ravallec Mesmin Alizannon Ramasamy Srinivasan Barry Robert Pittendrigh Anne-Nathalie Volkoff Manuele Tamò
author_facet	Djibril Aboubakar Souna Aimé Hippolyte Bokonon-Ganta Marc Ravallec Mesmin Alizannon Ramasamy Srinivasan Barry Robert Pittendrigh Anne-Nathalie Volkoff Manuele Tamò
author_sort	Djibril Aboubakar Souna
title	Progeny fitness determines the performance of the parasitoid Therophilus javanus, a prospective biocontrol agent against the legume pod borer
title_short	Progeny fitness determines the performance of the parasitoid Therophilus javanus, a prospective biocontrol agent against the legume pod borer
title_full	Progeny fitness determines the performance of the parasitoid Therophilus javanus, a prospective biocontrol agent against the legume pod borer
title_fullStr	Progeny fitness determines the performance of the parasitoid Therophilus javanus, a prospective biocontrol agent against the legume pod borer
title_full_unstemmed	Progeny fitness determines the performance of the parasitoid Therophilus javanus, a prospective biocontrol agent against the legume pod borer
title_sort	progeny fitness determines the performance of the parasitoid therophilus javanus, a prospective biocontrol agent against the legume pod borer
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/f07b52aa6bfa4b04a28637e93c5abcba
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Progeny fitness determines the performance of the parasitoid Therophilus javanus, a prospective biocontrol agent against the legume pod borer

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