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Laroche L., Ravel Sophie, Baldet T., Lancelot R., Chandre Fabrice, Rossigne M., Le Goff V., Duhayon M., Fafet J. F., Parker A. G., Bouyer J. (2020). Boosting the sterile insect technique with pyriproxyfen increases tsetse flies Glossina palpalis gambiensis sterilization in controlled conditions. Scientific Reports - Nature, 10 (1), art. 9947 [12 p.] ISSN 2045-2322

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Titre
Boosting the sterile insect technique with pyriproxyfen increases tsetse flies Glossina palpalis gambiensis sterilization in controlled conditions
Année de publication2020
Type de documentArticle référencé dans le Web of Science WOS:000543417700004
AuteursLaroche L., Ravel Sophie, Baldet T., Lancelot R., Chandre Fabrice, Rossigne M., Le Goff V., Duhayon M., Fafet J. F., Parker A. G., Bouyer J.
SourceScientific Reports - Nature, 2020, 10 (1), art. 9947 [12 p.] ISSN 2045-2322
RésuméTsetse flies (Diptera: Glossinidae) are the main vectors of animal and human trypanosomoses in Africa. The Sterile Insect Technique (SIT) has proven effective in controlling tsetse flies when applied to isolated populations but necessitates the production of large numbers of sterile males. A new approach, called boosted SIT, combining SIT with the contamination of wild females by sterile males coated with biocides has been proposed for large-scale control of vector populations. The aim of the study was to evaluate this new approach using pyriproxyfen on the riverine species Glossina palpalis gambiensis (Vanderplank, 1949) in the laboratory. The contamination dose and persistence of pyriproxyfen on sterile males, the impact of pyriproxyfen on male survival, and the dynamics of pyriproxyfen transfer from a sterile male to a female during mating, as well as the impact of pyriproxyfen on pupal production and adult emergence, were evaluated in the laboratory. For this purpose, a method of treatment by impregnating sterile males with a powder containing 40% pyriproxyfen has been developed. The results showed that the pyriproxyfen has no impact on the survival of sterile males. Pyriproxyfen persisted on sterile males for up to 10 days at a dose of 100ng per fly. In addition, the horizontal transfer of pyriproxyfen from a treated sterile male to a female during mating could be measured with an average of 50ng of pyriproxyfen transferred. After contacts without mating, the average quantity transferred was more than 10ng. Finally, the pyriproxyfen powder was very effective on G. p. gambiensis leading to 0% emergence of the pupae produced by contaminated females. These promising results must be confirmed in the field. A large-scale assessment of this boosted pyriproxyfen-based SIT approach will be carried out against tsetse flies in Senegal (West Africa).
Plan de classementEntomologie médicale / Parasitologie / Virologie [052] ; Sciences fondamentales / Techniques d'analyse et de recherche [020]
Descr. géo.AFRIQUE SUBSAHARIENNE
LocalisationFonds IRD [F B010079312]
Identifiant IRDfdi:010079312
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010079312

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