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A Comparative Study on the Functional Response of Wolbachia-Infected and Uninfected Forms of the Parasitoid Wasp Trichogramma brassicae

Trichogramma species (Hymenoptera: Trichogrammatidae) are haplo-diploid egg parasitoids that are frequently used as biological control agents against lepidopteran pests. These wasps display two reproductive modes, including arrhenotoky (bisexuality) and thelytoky (unisexuality). Thelytokous forms ar...

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Detalles Bibliográficos
Autores principales: Farrokhi, S., Ashouri, A., Shirazi, J., Allahvari, H., Huigens, M.E.
Formato: Texto
Lenguaje:English
Publicado: University of Wisconsin Library 2010
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3016869/
https://www.ncbi.nlm.nih.gov/pubmed/21062211
http://dx.doi.org/10.1673/031.010.14127
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author Farrokhi, S.
Ashouri, A.
Shirazi, J.
Allahvari, H.
Huigens, M.E.
author_facet Farrokhi, S.
Ashouri, A.
Shirazi, J.
Allahvari, H.
Huigens, M.E.
author_sort Farrokhi, S.
collection PubMed
description Trichogramma species (Hymenoptera: Trichogrammatidae) are haplo-diploid egg parasitoids that are frequently used as biological control agents against lepidopteran pests. These wasps display two reproductive modes, including arrhenotoky (bisexuality) and thelytoky (unisexuality). Thelytokous forms are often associated with the presence of endosymbiotic Wolbachia bacteria. The use of thelytokous wasps has long been considered as a way to enhance the efficacy of biological control. The present study investigates the potential of a thelytokous Wolbachia-infected and an arrhenotokous uninfected Trichogramma brassicae Bezdenko strain as inundative biocontrol agents by evaluating their functional response towards different egg densities of the factitious host, the Angoumois grain moth, Sitotroga cerealella (Olivier) (Lepidoptera: Gelechiidae). The results revealed a type II functional response for both strains in which parasitism efficiency decreases with host egg density because of an increasing host handling time. A model with an indicator variable was used to compare the parameters of Holling's disc equation in different data sets. It was demonstrated that the two strains did not differ in host attack rate. However, the Wolbachia-infected strain did have an increased host handling time when compared to the bisexual strain. Some applied aspects of the findings are discussed.
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spelling pubmed-30168692012-02-09 A Comparative Study on the Functional Response of Wolbachia-Infected and Uninfected Forms of the Parasitoid Wasp Trichogramma brassicae Farrokhi, S. Ashouri, A. Shirazi, J. Allahvari, H. Huigens, M.E. J Insect Sci Article Trichogramma species (Hymenoptera: Trichogrammatidae) are haplo-diploid egg parasitoids that are frequently used as biological control agents against lepidopteran pests. These wasps display two reproductive modes, including arrhenotoky (bisexuality) and thelytoky (unisexuality). Thelytokous forms are often associated with the presence of endosymbiotic Wolbachia bacteria. The use of thelytokous wasps has long been considered as a way to enhance the efficacy of biological control. The present study investigates the potential of a thelytokous Wolbachia-infected and an arrhenotokous uninfected Trichogramma brassicae Bezdenko strain as inundative biocontrol agents by evaluating their functional response towards different egg densities of the factitious host, the Angoumois grain moth, Sitotroga cerealella (Olivier) (Lepidoptera: Gelechiidae). The results revealed a type II functional response for both strains in which parasitism efficiency decreases with host egg density because of an increasing host handling time. A model with an indicator variable was used to compare the parameters of Holling's disc equation in different data sets. It was demonstrated that the two strains did not differ in host attack rate. However, the Wolbachia-infected strain did have an increased host handling time when compared to the bisexual strain. Some applied aspects of the findings are discussed. University of Wisconsin Library 2010-10-01 /pmc/articles/PMC3016869/ /pubmed/21062211 http://dx.doi.org/10.1673/031.010.14127 Text en © 2010 http://creativecommons.org/licenses/by/2.5/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Article
Farrokhi, S.
Ashouri, A.
Shirazi, J.
Allahvari, H.
Huigens, M.E.
A Comparative Study on the Functional Response of Wolbachia-Infected and Uninfected Forms of the Parasitoid Wasp Trichogramma brassicae
title A Comparative Study on the Functional Response of Wolbachia-Infected and Uninfected Forms of the Parasitoid Wasp Trichogramma brassicae
title_full A Comparative Study on the Functional Response of Wolbachia-Infected and Uninfected Forms of the Parasitoid Wasp Trichogramma brassicae
title_fullStr A Comparative Study on the Functional Response of Wolbachia-Infected and Uninfected Forms of the Parasitoid Wasp Trichogramma brassicae
title_full_unstemmed A Comparative Study on the Functional Response of Wolbachia-Infected and Uninfected Forms of the Parasitoid Wasp Trichogramma brassicae
title_short A Comparative Study on the Functional Response of Wolbachia-Infected and Uninfected Forms of the Parasitoid Wasp Trichogramma brassicae
title_sort comparative study on the functional response of wolbachia-infected and uninfected forms of the parasitoid wasp trichogramma brassicae
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3016869/
https://www.ncbi.nlm.nih.gov/pubmed/21062211
http://dx.doi.org/10.1673/031.010.14127
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