Testing a pyriproxyfen auto-dissemination station attractive to gravid Anopheles gambiae sensu stricto for the development of a novel attract-release - and-kill strategy for malaria vector co

Abstract:

Background: Larviciding is an effective supplementary tool for malaria vector control, but the identification and accessibility of aquatic habitats impedes application. Dissemination of the insect growth regulator, pyriproxyfen (PPF), by gravid Anopheles might constitute a novel application strategy. This study aimed to explore the feasibility of using an attractive bait-station to contaminate gravid Anopheles gambiae sensu stricto with PPF and subsequently transfer PPF to larval habitats. Methods: A bait-station was developed comprising of an artificial pond containing water treated with 20 ppm cedrol, an oviposition attractant, and a netting-cover treated with PPF. Three identical semi-field cages were used to assess the potential of gravid Anopheles to transfer PPF from the bait-station to ponds. Gravid females were released in two semi-field cages, one with PPF on its bait-station (test) and one without PPF (control). No mosquitoes were released in the third cage with a PPF-treated station (control). Transfer of PPF to open ponds was assessed by monitoring emergence of late instar insectary-reared larvae introduced into the ponds. The amount of PPF carried by a mosquito and transferred to water was quantified using liquid chromatography-mass spectrometry. Results: In the controls, 86% (95% CI 81–89%) of larvae introduced into open ponds developed into adults, indicating that wind did not distribute PPF in absence of mosquitoes. Emergence inhibition was observed in the test cage but was dependent on the distance between pond and bait-station. Only 25% (95% CI 22–29%) of larvae emerged as adults from ponds 4 m from the bait-station, but 92% (95% CI 89–94%) emerged from ponds 10 m away. Each mosquito was contaminated on average with 112 μg (95% CI 93–123 μg) PPF resulting in the transfer of 230 ng/L (95% CI 180–290 ng/L) PPF to 100 ml volumes of water. Conclusions: The bait-stations successfully attracted gravid females which were subsequently dusted with effective levels of PPF. However, in this study design, attraction and dissemination was limited to short distances. To make this approach feasible for malaria vector control, stronger attractants that lure gravid females from longer distances, in landscapes with many water bodies, and better PPF delivery systems are needed.
Subscribe to access this work and thousands more
Overall Rating

0

5 Star
(0)
4 Star
(0)
3 Star
(0)
2 Star
(0)
1 Star
(0)
APA

Public Library, A. & O., M (2024). Testing a pyriproxyfen auto-dissemination station attractive to gravid Anopheles gambiae sensu stricto for the development of a novel attract-release - and-kill strategy for malaria vector co. Afribary. Retrieved from https://afribary.com/works/testing-a-pyriproxyfen-auto-dissemination-station-attractive-to-gravid-anopheles-gambiae-sensu-stricto-for-the-development-of-a-novel-attract-release-and-kill-strategy-for-malaria-vector-cont

MLA 8th

Public Library, Africana, and Mbare O. "Testing a pyriproxyfen auto-dissemination station attractive to gravid Anopheles gambiae sensu stricto for the development of a novel attract-release - and-kill strategy for malaria vector co" Afribary. Afribary, 10 Mar. 2024, https://afribary.com/works/testing-a-pyriproxyfen-auto-dissemination-station-attractive-to-gravid-anopheles-gambiae-sensu-stricto-for-the-development-of-a-novel-attract-release-and-kill-strategy-for-malaria-vector-cont. Accessed 25 May. 2024.

MLA7

Public Library, Africana, and Mbare O. . "Testing a pyriproxyfen auto-dissemination station attractive to gravid Anopheles gambiae sensu stricto for the development of a novel attract-release - and-kill strategy for malaria vector co". Afribary, Afribary, 10 Mar. 2024. Web. 25 May. 2024. < https://afribary.com/works/testing-a-pyriproxyfen-auto-dissemination-station-attractive-to-gravid-anopheles-gambiae-sensu-stricto-for-the-development-of-a-novel-attract-release-and-kill-strategy-for-malaria-vector-cont >.

Chicago

Public Library, Africana and O., Mbare . "Testing a pyriproxyfen auto-dissemination station attractive to gravid Anopheles gambiae sensu stricto for the development of a novel attract-release - and-kill strategy for malaria vector co" Afribary (2024). Accessed May 25, 2024. https://afribary.com/works/testing-a-pyriproxyfen-auto-dissemination-station-attractive-to-gravid-anopheles-gambiae-sensu-stricto-for-the-development-of-a-novel-attract-release-and-kill-strategy-for-malaria-vector-cont

Document Details
Mbare, O. Field: Biology Type: Article/Essay 12 PAGES (9727 WORDS) (pdf)