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Optimizing the Application Timing and Dosage of<i>Metarhizium brunneum</i>(Hypocreales: Clavicipitaceae) as a Biological Control Agent of<i>Aedes aegypti</i>(Diptera: Culicidae) Larvae

A M Alkhaibari Orcid Logo, M J Wood Orcid Logo, S I Yavasoglu, James Bull Orcid Logo, Tariq Butt Orcid Logo

Journal of Medical Entomology, Volume: 60, Issue: 2, Pages: 339 - 345

Swansea University Authors: James Bull Orcid Logo, Tariq Butt Orcid Logo

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DOI (Published version): 10.1093/jme/tjac186

Abstract

Aedes aegypti (Diptera: Culicidae) is the principal vector of dengue and other viruses that cause disease among 100 to 400 million people each year. The recent development of widespread insecticidal resistance has led to the rapid development of biological control solutions aimed at larval control....

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Published in: Journal of Medical Entomology
ISSN: 0022-2585 1938-2928
Published: Oxford University Press (OUP) 2023
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URI: https://cronfa.swan.ac.uk/Record/cronfa63000
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The recent development of widespread insecticidal resistance has led to the rapid development of biological control solutions aimed at larval control. While the efficacy of Metarhizium brunneum has been shown against Aedes larvae, the impact of larval population dynamics will need to be determined to formulate effective control strategies. In this study, larvae were subjected to four concentrations of M. brunneum (105, 106, 107, 108 conidia ml-1). Larvae were found to be susceptible to M. brunneum with dose-dependent efficacy. When constant larval immigration was added as a parameter, peak mortality was consistently found to occur on the fourth day, before a significant reduction in control efficacy linked to a decline in conidial availability within the water column. This suggests that M. brunneum treatments should be applied at a concentration 1 &#xD7; 107 conidia ml-1 every four days to effectively control mosquito larvae in the field, regardless of the fungal formulation, water volume, or larval density. Understanding fungal-mosquito dynamics is critical in developing appropriate control programs as it helps optimize the fungal control agent's dose and frequency of application.</abstract><type>Journal Article</type><journal>Journal of Medical Entomology</journal><volume>60</volume><journalNumber>2</journalNumber><paginationStart>339</paginationStart><paginationEnd>345</paginationEnd><publisher>Oxford University Press (OUP)</publisher><placeOfPublication/><isbnPrint/><isbnElectronic/><issnPrint>0022-2585</issnPrint><issnElectronic>1938-2928</issnElectronic><keywords/><publishedDay>6</publishedDay><publishedMonth>3</publishedMonth><publishedYear>2023</publishedYear><publishedDate>2023-03-06</publishedDate><doi>10.1093/jme/tjac186</doi><url>http://dx.doi.org/10.1093/jme/tjac186</url><notes/><college>COLLEGE NANME</college><department>Biosciences</department><CollegeCode>COLLEGE CODE</CollegeCode><DepartmentCode>SBI</DepartmentCode><institution>Swansea University</institution><apcterm/><funders>This work is supported by the Deanship of Scientific Research at the University of Tabuk under grant (S-1440-0214) and by the Knowledge Economy Skills Scholarships initiative; part funded by the Welsh Government&#x2019;s European Social Fund (ESF) convergence program for West Wales and the Valleys with industry support from AgriSense BCS Ltd.</funders><projectreference/><lastEdited>2023-03-21T09:46:14.7911406</lastEdited><Created>2023-03-21T09:43:02.9980606</Created><path><level id="1">Faculty of Science and Engineering</level><level id="2">School of Biosciences, Geography and Physics - Biosciences</level></path><authors><author><firstname>A M</firstname><surname>Alkhaibari</surname><orcid>0000-0003-4376-2438</orcid><order>1</order></author><author><firstname>M J</firstname><surname>Wood</surname><orcid>0000-0002-3229-7932</orcid><order>2</order></author><author><firstname>S I</firstname><surname>Yavasoglu</surname><order>3</order></author><author><firstname>James</firstname><surname>Bull</surname><orcid>0000-0002-4373-6830</orcid><order>4</order></author><author><firstname>Tariq</firstname><surname>Butt</surname><orcid>0000-0002-8789-9543</orcid><order>5</order></author></authors><documents><document><filename>63000__26910__1a9897c1cd894c15ac553e7c640b16e6.pdf</filename><originalFilename>63000.pdf</originalFilename><uploaded>2023-03-21T09:45:34.1471933</uploaded><type>Output</type><contentLength>473579</contentLength><contentType>application/pdf</contentType><version>Version of Record</version><cronfaStatus>true</cronfaStatus><documentNotes>This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.</documentNotes><copyrightCorrect>false</copyrightCorrect><language>eng</language><licence>https://creativecommons.org/licenses/by/4.0/</licence></document></documents><OutputDurs/></rfc1807>
spelling 2023-03-21T09:46:14.7911406 v2 63000 2023-03-21 Optimizing the Application Timing and Dosage of<i>Metarhizium brunneum</i>(Hypocreales: Clavicipitaceae) as a Biological Control Agent of<i>Aedes aegypti</i>(Diptera: Culicidae) Larvae 20742518482c020c80b81b88e5313356 0000-0002-4373-6830 James Bull James Bull true false 85d1c2ddde272a1176e74978e25ebece 0000-0002-8789-9543 Tariq Butt Tariq Butt true false 2023-03-21 SBI Aedes aegypti (Diptera: Culicidae) is the principal vector of dengue and other viruses that cause disease among 100 to 400 million people each year. The recent development of widespread insecticidal resistance has led to the rapid development of biological control solutions aimed at larval control. While the efficacy of Metarhizium brunneum has been shown against Aedes larvae, the impact of larval population dynamics will need to be determined to formulate effective control strategies. In this study, larvae were subjected to four concentrations of M. brunneum (105, 106, 107, 108 conidia ml-1). Larvae were found to be susceptible to M. brunneum with dose-dependent efficacy. When constant larval immigration was added as a parameter, peak mortality was consistently found to occur on the fourth day, before a significant reduction in control efficacy linked to a decline in conidial availability within the water column. This suggests that M. brunneum treatments should be applied at a concentration 1 × 107 conidia ml-1 every four days to effectively control mosquito larvae in the field, regardless of the fungal formulation, water volume, or larval density. Understanding fungal-mosquito dynamics is critical in developing appropriate control programs as it helps optimize the fungal control agent's dose and frequency of application. Journal Article Journal of Medical Entomology 60 2 339 345 Oxford University Press (OUP) 0022-2585 1938-2928 6 3 2023 2023-03-06 10.1093/jme/tjac186 http://dx.doi.org/10.1093/jme/tjac186 COLLEGE NANME Biosciences COLLEGE CODE SBI Swansea University This work is supported by the Deanship of Scientific Research at the University of Tabuk under grant (S-1440-0214) and by the Knowledge Economy Skills Scholarships initiative; part funded by the Welsh Government’s European Social Fund (ESF) convergence program for West Wales and the Valleys with industry support from AgriSense BCS Ltd. 2023-03-21T09:46:14.7911406 2023-03-21T09:43:02.9980606 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences A M Alkhaibari 0000-0003-4376-2438 1 M J Wood 0000-0002-3229-7932 2 S I Yavasoglu 3 James Bull 0000-0002-4373-6830 4 Tariq Butt 0000-0002-8789-9543 5 63000__26910__1a9897c1cd894c15ac553e7c640b16e6.pdf 63000.pdf 2023-03-21T09:45:34.1471933 Output 473579 application/pdf Version of Record true This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. false eng https://creativecommons.org/licenses/by/4.0/
title Optimizing the Application Timing and Dosage of<i>Metarhizium brunneum</i>(Hypocreales: Clavicipitaceae) as a Biological Control Agent of<i>Aedes aegypti</i>(Diptera: Culicidae) Larvae
spellingShingle Optimizing the Application Timing and Dosage of<i>Metarhizium brunneum</i>(Hypocreales: Clavicipitaceae) as a Biological Control Agent of<i>Aedes aegypti</i>(Diptera: Culicidae) Larvae
James Bull
Tariq Butt
title_short Optimizing the Application Timing and Dosage of<i>Metarhizium brunneum</i>(Hypocreales: Clavicipitaceae) as a Biological Control Agent of<i>Aedes aegypti</i>(Diptera: Culicidae) Larvae
title_full Optimizing the Application Timing and Dosage of<i>Metarhizium brunneum</i>(Hypocreales: Clavicipitaceae) as a Biological Control Agent of<i>Aedes aegypti</i>(Diptera: Culicidae) Larvae
title_fullStr Optimizing the Application Timing and Dosage of<i>Metarhizium brunneum</i>(Hypocreales: Clavicipitaceae) as a Biological Control Agent of<i>Aedes aegypti</i>(Diptera: Culicidae) Larvae
title_full_unstemmed Optimizing the Application Timing and Dosage of<i>Metarhizium brunneum</i>(Hypocreales: Clavicipitaceae) as a Biological Control Agent of<i>Aedes aegypti</i>(Diptera: Culicidae) Larvae
title_sort Optimizing the Application Timing and Dosage of<i>Metarhizium brunneum</i>(Hypocreales: Clavicipitaceae) as a Biological Control Agent of<i>Aedes aegypti</i>(Diptera: Culicidae) Larvae
author_id_str_mv 20742518482c020c80b81b88e5313356
85d1c2ddde272a1176e74978e25ebece
author_id_fullname_str_mv 20742518482c020c80b81b88e5313356_***_James Bull
85d1c2ddde272a1176e74978e25ebece_***_Tariq Butt
author James Bull
Tariq Butt
author2 A M Alkhaibari
M J Wood
S I Yavasoglu
James Bull
Tariq Butt
format Journal article
container_title Journal of Medical Entomology
container_volume 60
container_issue 2
container_start_page 339
publishDate 2023
institution Swansea University
issn 0022-2585
1938-2928
doi_str_mv 10.1093/jme/tjac186
publisher Oxford University Press (OUP)
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
url http://dx.doi.org/10.1093/jme/tjac186
document_store_str 1
active_str 0
description Aedes aegypti (Diptera: Culicidae) is the principal vector of dengue and other viruses that cause disease among 100 to 400 million people each year. The recent development of widespread insecticidal resistance has led to the rapid development of biological control solutions aimed at larval control. While the efficacy of Metarhizium brunneum has been shown against Aedes larvae, the impact of larval population dynamics will need to be determined to formulate effective control strategies. In this study, larvae were subjected to four concentrations of M. brunneum (105, 106, 107, 108 conidia ml-1). Larvae were found to be susceptible to M. brunneum with dose-dependent efficacy. When constant larval immigration was added as a parameter, peak mortality was consistently found to occur on the fourth day, before a significant reduction in control efficacy linked to a decline in conidial availability within the water column. This suggests that M. brunneum treatments should be applied at a concentration 1 × 107 conidia ml-1 every four days to effectively control mosquito larvae in the field, regardless of the fungal formulation, water volume, or larval density. Understanding fungal-mosquito dynamics is critical in developing appropriate control programs as it helps optimize the fungal control agent's dose and frequency of application.
published_date 2023-03-06T04:23:28Z
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score 11.013148

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