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Li Y, Peng J, Li H, Zhang R, Chen J, Hou X, Yang G. Integrating pyriproxyfen into the incompatible insect technique enhances mosquito population suppression efficiency and eliminates the risk of population replacement. PEST MANAGEMENT SCIENCE 2024. [PMID: 39072896 DOI: 10.1002/ps.8339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2024] [Revised: 06/28/2024] [Accepted: 07/14/2024] [Indexed: 07/30/2024]
Abstract
BACKGROUND The incompatible insect technique (IIT) has been used for Aedes mosquito population suppression to curb the transmission of dengue. However, its wide application is limited owing to the low output of male mosquitoes and the risk of population replacement from the release of fertile Wolbachia-infected females. This study aims to improve IIT efficiency for broader adoption. RESULTS We assessed the impact of 10% pyriproxyfen (PPF) sticky powder exposure on Wolbachia (from Culex molestus)-transinfected Aedes albopictus Guangzhou line (GUA line) (GC) mosquitoes. We found that the exposure caused chronic toxicity in adult mosquitoes without affecting the cytoplasmic incompatibility (CI)-inducing capability of males. The PPF-contaminated GC females exhibited significant sterilization and the ability to disseminate lethal doses of PPF to breeding sites. Subsequently, we conducted a field trial combining PPF with IIT aiming to suppress the Ae. albopictus population. This combined approach, termed boosted IIT (BIIT), showed a notable enhancement in population suppression efficiency. The improved efficacy of BIIT was attributed to the dispersion of PPF particles in the field via the released PPF-contaminated male mosquitoes. During the BIIT field trial, no Wolbachia wPip-positive Ae. albopictus larvae were detected, indicating the effective elimination of the risk of Wolbachia-induced population replacement. Additionally, the field trial of BIIT against Ae. albopictus resulted in the suppression of the nontarget mosquito species Culex quinquefasciatus. CONCLUSION Our results highlight the remarkable efficiency and feasibility of combining IIT with PPF in suppressing mosquito populations, facilitating the widespread implementation of IIT-based management of mosquito-borne diseases. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Yongjun Li
- Department of Pathogen Biology, School of Medicine, Jinan University, Guangzhou, China
| | - Jiameng Peng
- Department of Pathogen Biology, School of Medicine, Jinan University, Guangzhou, China
| | - Haiying Li
- Department of Epidemiology, School of Medicine, Jinan University, Guangzhou, China
| | - Ruiqi Zhang
- International School, Jinan University, Guangzhou, China
| | - Jiexia Chen
- Department of Pathogen Biology, School of Medicine, Jinan University, Guangzhou, China
| | - Xiuying Hou
- Department of Pathogen Biology, School of Medicine, Jinan University, Guangzhou, China
| | - Guang Yang
- Department of Pathogen Biology, School of Medicine, Jinan University, Guangzhou, China
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Rodrigues-Alves ML, Melo-Júnior OADO, Silveira P, Mariano RMDS, Leite JC, Santos TAP, Soares IS, Lair DF, Melo MM, Resende LA, da Silveira-Lemos D, Dutra WO, Gontijo NDF, Araujo RN, Sant'Anna MRV, Andrade LAF, da Fonseca FG, Moreira LA, Giunchetti RC. Historical Perspective and Biotechnological Trends to Block Arboviruses Transmission by Controlling Aedes aegypti Mosquitos Using Different Approaches. Front Med (Lausanne) 2020; 7:275. [PMID: 32656216 PMCID: PMC7325419 DOI: 10.3389/fmed.2020.00275] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 05/18/2020] [Indexed: 12/30/2022] Open
Abstract
Continuous climate changes associated with the disorderly occupation of urban areas have exposed Latin American populations to the emergence and reemergence of arboviruses transmitted by Aedes aegypti. The magnitude of the financial and political problems these epidemics may bring to the future of developing countries is still ignored. Due to the lack of effective antiviral drugs and vaccines against arboviruses, the primary measure for preventing or reducing the transmission of diseases depends entirely on the control of vectors or the interruption of human-vector contact. In Brazil the first attempt to control A. aegypti took place in 1902 by eliminating artificial sites of eproduction. Other strategies, such as the use of oviposition traps and chemical control with dichlorodiphenyltrichlorethane and pyrethroids, were successful, but only for a limited time. More recently, biotechnical approaches, such as the release of transgenics or sterile mosquitoes and the, development of transmission blocking vaccines, are being applied to try to control the A. aegypti population and/or arbovirus transmission. Endemic countries spend about twice as much to treat patients as they do on the prevention of mosquito-transmitted diseases. The result of this strategy is an explosive outbreak of arboviruses cases. This review summarizes the social impacts caused by A. aegypti-transmitted diseases, mainly from a biotechnological perspective in vector control aimed at protecting Latin American populations against arboviruses.
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Affiliation(s)
- Marina Luiza Rodrigues-Alves
- Laboratório de Biologia das Interações Celulares, Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Otoni Alves de Oliveira Melo-Júnior
- Laboratório de Biologia das Interações Celulares, Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Patrícia Silveira
- Laboratório de Biologia das Interações Celulares, Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Reysla Maria da Silveira Mariano
- Laboratório de Biologia das Interações Celulares, Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Jaqueline Costa Leite
- Laboratório de Biologia das Interações Celulares, Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Thaiza Aline Pereira Santos
- Laboratório de Biologia das Interações Celulares, Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Ingrid Santos Soares
- Laboratório de Biologia das Interações Celulares, Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Daniel Ferreira Lair
- Laboratório de Biologia das Interações Celulares, Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Marília Martins Melo
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Lucilene Aparecida Resende
- Laboratório de Biologia das Interações Celulares, Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Denise da Silveira-Lemos
- Laboratório de Biologia das Interações Celulares, Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- Departamento de Medicina, Universidade José Do Rosário Vellano, UNIFENAS, Belo Horizonte, Brazil
| | - Walderez Ornelas Dutra
- Laboratório de Biologia das Interações Celulares, Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Nelder de Figueiredo Gontijo
- Laboratório de Fisiologia de Insetos Hematófagos, Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Ricardo Nascimento Araujo
- Laboratório de Fisiologia de Insetos Hematófagos, Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Mauricio Roberto Viana Sant'Anna
- Laboratório de Fisiologia de Insetos Hematófagos, Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Luis Adan Flores Andrade
- Laboratório de Virologia Básica e Aplicada, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Flávio Guimarães da Fonseca
- Laboratório de Virologia Básica e Aplicada, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Luciano Andrade Moreira
- Laboratório de Mosquitos Vetores: Endossimbiontes e Interação Patógeno-Vetor, Instituto René Rachou, Fiocruz, Belo Horizonte, Brazil
| | - Rodolfo Cordeiro Giunchetti
- Laboratório de Biologia das Interações Celulares, Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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Hustedt JC, Boyce R, Bradley J, Hii J, Alexander N. Use of pyriproxyfen in control of Aedes mosquitoes: A systematic review. PLoS Negl Trop Dis 2020; 14:e0008205. [PMID: 32530915 PMCID: PMC7314096 DOI: 10.1371/journal.pntd.0008205] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 06/24/2020] [Accepted: 03/10/2020] [Indexed: 01/11/2023] Open
Abstract
Dengue is the most rapidly spreading arboviral disease in the world. The current lack of fully protective vaccines and clinical therapeutics creates an urgent need to identify more effective means of controlling Aedes mosquitos, principally Aedes aegypti, as the main vector of dengue. Pyriproxyfen (PPF) is an increasingly used hormone analogue that prevents juvenile Aedes mosquitoes from becoming adults and being incapable of transmitting dengue. The objectives of the review were to (1) Determine the effect of PPF on endpoints including percentage inhibition of emergence to adulthood, larval mortality, and resistance ratios; and (2) Determine the different uses, strengths, and limitations of PPF in control of Aedes. A systematic search was applied to Pubmed, EMBASE, Web of Science, LILACS, Global Health, and the Cochrane database of Systematic Reviews. Out of 1,369 records, 90 studies met the inclusion criteria. Nearly all fit in one of the following four categories 1) Efficacy of granules, 2) Auto-dissemination/horizontal transfer, 3) use of ultra-low volume thermal fogging (ULV), thermal fogging (TF), or fumigant technologies, and 4) assessing mosquito resistance. PPF granules had consistently efficacious results of 90-100% inhibition of emergence for up to 90 days. The evidence is less robust but promising regarding PPF dust for auto-dissemination and the use of PPF in ULV, TF and fumigants. Several studies also found that while mosquito populations were still susceptible to PPF, the lethal concentrations increased among temephos-resistant mosquitoes compared to reference strains. The evidence is strong that PPF does increase immature mortality and adult inhibition in settings represented in the included studies, however future research should focus on areas where there is less evidence (e.g. auto-dissemination, sprays) and new use cases for PPF. A better understanding of the biological mechanisms of cross-resistance between PPF, temephos, and other insecticides will allow control programs to make better informed decisions.
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Affiliation(s)
- John Christian Hustedt
- MRC Tropical Epidemiology Group, Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, United Kingdom
- Epidemiology Department, Malaria Consortium, London, United Kingdom
| | - Ross Boyce
- Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - John Bradley
- MRC Tropical Epidemiology Group, Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Jeffrey Hii
- Epidemiology Department, Malaria Consortium, London, United Kingdom
| | - Neal Alexander
- MRC Tropical Epidemiology Group, Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, United Kingdom
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Brelsfoard CL, Mains JW, Mulligan S, Cornel A, Holeman J, Kluh S, Leal A, Hribar LJ, Morales H, Posey T, Dobson SL. Aedes aegypti Males as Vehicles for Insecticide Delivery. INSECTS 2019; 10:insects10080230. [PMID: 31374806 PMCID: PMC6722502 DOI: 10.3390/insects10080230] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 07/25/2019] [Accepted: 07/26/2019] [Indexed: 12/02/2022]
Abstract
Aedes aegypti continues to spread globally and remains a challenge to control, in part due to its ‘cryptic behavior’ in that it often deposits eggs (oviposits) in larval habitats that are difficult to find and treat using traditional methods. Auto-dissemination strategies target these cryptic breeding sites by employing mosquitoes to deliver lethal doses of insecticide. This report describes the initial field trials of an application known as Autodissemination Augmented by Males (ADAM), utilizing A. aegypti males dusted with pyriproxyfen (PPF). Findings presented here are drawn from both caged and field trial studies. Together, these trials examined for the ability of A. aegypti males to disseminate PPF and to impact field populations. PPF-dusted males were able to effectively deliver lethal doses of PPF to oviposition sites under the conditions tested. Results from field trials in Florida and California demonstrated reduced A. aegypti populations in treated areas, compared to areas where PPF-treated males were not released. These results indicate that the release of PPF-dusted A. aegypti males can impact A. aegypti populations as measured by both reduced larval survival and lower numbers of adult female A. aegypti. We propose the ADAM approach as an addition to existing mosquito control techniques targeting A. aegypti and other mosquitoes that utilize cryptic larval habitats.
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Affiliation(s)
| | - James W Mains
- MosquitoMate, Inc., 2520 Regency Rd., Lexington, KY 40503, USA
| | - Steve Mulligan
- Consolidated Mosquito Abatement District, 2425 Floral Ave., Selma, CA 93662, USA
| | - Anthony Cornel
- Department of Entomology and Nematology, University of California, Davis; Davis, CA 95616, USA
| | - Jodi Holeman
- Consolidated Mosquito Abatement District, 2425 Floral Ave., Selma, CA 93662, USA
| | - Susanne Kluh
- Greater Los Angeles Vector Control District, 12545 Florence Ave., Santa Fe Springs, CA 90670, USA
| | - Andrea Leal
- Florida Keys Mosquito Control District, 18 Aquamarine Drive, Key West, FL 33040, USA
| | - Lawrence J Hribar
- Florida Keys Mosquito Control District, 18 Aquamarine Drive, Key West, FL 33040, USA
| | - Harold Morales
- Greater Los Angeles Vector Control District, 12545 Florence Ave., Santa Fe Springs, CA 90670, USA
| | - Tanya Posey
- Greater Los Angeles Vector Control District, 12545 Florence Ave., Santa Fe Springs, CA 90670, USA
| | - Stephen L Dobson
- MosquitoMate, Inc., 2520 Regency Rd., Lexington, KY 40503, USA
- Entomology Department, University of Kentucky, Lexington, KY 40546, USA
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Gómez-Bravo A, Alvarez-Costa A, Fronza G, Abril M, Zerba EN, Juan LW. High effectiveness of an adulticide-larvicide formulation for field control of sandflies (Diptera: Psychodidae) in the city of Clorinda, Argentina. Parasite Epidemiol Control 2019; 7:e00110. [PMID: 31236488 PMCID: PMC6581875 DOI: 10.1016/j.parepi.2019.e00110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 05/02/2019] [Accepted: 05/04/2019] [Indexed: 11/28/2022] Open
Abstract
In Argentina, Leishmania infantum (syn. L. chagasi) is the etiologic agent of human visceral leishmaniosis (HVL), and Lutzomyia longipalpis (Diptera: Psychodidae: Phlebotominae) is the main vector. The objective of this study was to evaluate the effectiveness and residual effect of two commercial insecticide formulations, one with permethrin and pyriproxyfen as active ingredients (Dragon Max®) and the other with only permethrin (Flop®) for the control of sandflies. Both formulations were applied in chicken coops and other surroundings structures of the peridomicile of urban houses in Clorinda, Formosa (Argentina). Entomological monitoring was carried out weekly for 44 weeks after the intervention. The results showed great effectiveness and residual effect up to 21 weeks post-intervention for Dragon Max®. This result could be explained by the excellent larvicidal activity of the Insect Growth Regulator (IGR) pyriproxyfen against the immature forms of phlebotomines and by the delay on the restoration of the natural threshold of the vector population in treated sites.
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Affiliation(s)
- Andrea Gómez-Bravo
- Fundación Mundo Sano, Paraguay 1535, Ciudad Autónoma de Buenos Aires, Argentina
| | - Agustín Alvarez-Costa
- Centro de Investigaciones de Plagas e Insecticidas, UNIDEF, CITEDEF, CONICET, Juan 10 Bautista de la Salle 4397, Villa Martelli, Buenos Aires, Argentina
| | - Georgina Fronza
- Centro de Investigaciones de Plagas e Insecticidas, UNIDEF, CITEDEF, CONICET, Juan 10 Bautista de la Salle 4397, Villa Martelli, Buenos Aires, Argentina
| | - Marcelo Abril
- Fundación Mundo Sano, Paraguay 1535, Ciudad Autónoma de Buenos Aires, Argentina
| | - Eduardo N Zerba
- Centro de Investigaciones de Plagas e Insecticidas, UNIDEF, CITEDEF, CONICET, Juan 10 Bautista de la Salle 4397, Villa Martelli, Buenos Aires, Argentina.,Instituto de Investigación e Ingeniería Ambiental, Universidad Nacional de San Martín, Campus Miguelete, 25 de Mayo y Francia, San Martín, Buenos Aires, Argentina
| | - Laura W Juan
- Centro de Investigaciones de Plagas e Insecticidas, UNIDEF, CITEDEF, CONICET, Juan 10 Bautista de la Salle 4397, Villa Martelli, Buenos Aires, Argentina.,Instituto de Investigación sobre Producción Agropecuaria, Ambiente y Salud, Facultad de Ciencias Agrarias, Universidad Nacional de Lomas de Zamora, Camino de Cintura y Juan XXIII, Lomas de Zamora, Buenos Aires, Argentina
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Maoz D, Ward T, Samuel M, Müller P, Runge-Ranzinger S, Toledo J, Boyce R, Velayudhan R, Horstick O. Community effectiveness of pyriproxyfen as a dengue vector control method: A systematic review. PLoS Negl Trop Dis 2017; 11:e0005651. [PMID: 28715426 PMCID: PMC5531696 DOI: 10.1371/journal.pntd.0005651] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 07/27/2017] [Accepted: 05/19/2017] [Indexed: 01/08/2023] Open
Abstract
Background Vector control is the only widely utilised method for primary prevention and control of dengue. The use of pyriproxyfen may be promising, and autodissemination approach may reach hard to reach breeding places. It offers a unique mode of action (juvenile hormone mimic) and as an additional tool for the management of insecticide resistance among Aedes vectors. However, evidence of efficacy and community effectiveness (CE) remains limited. Objective The aim of this systematic review is to compile and analyse the existing literature for evidence on the CE of pyriproxyfen as a vector control method for reducing Ae. aegypti and Ae. albopictus populations and thereby human dengue transmission. Methods Systematic search of PubMed, Embase, Lilacs, Cochrane library, WHOLIS, Web of Science, Google Scholar as well as reference lists of all identified studies. Removal of duplicates, screening of abstracts and assessment for eligibility of the remaining studies followed. Relevant data were extracted, and a quality assessment conducted. Results were classified into four main categories of how pyriproxyfen was applied: - 1) container treatment, 2) fumigation, 3) auto-dissemination or 4) combination treatments,–and analysed with a view to their public health implication. Results Out of 745 studies 17 studies were identified that fulfilled all eligibility criteria. The results show that pyriproxyfen can be effective in reducing the numbers of Aedes spp. immatures with different methods of application when targeting their main breeding sites. However, the combination of pyriproxyfen with a second product increases efficacy and/or persistence of the intervention and may also slow down the development of insecticide resistance. Open questions concern concentration and frequency of application in the various treatments. Area-wide ultra-low volume treatment with pyriproxyfen currently lacks evidence and cannot be recommended. Community participation and acceptance has not consistently been successful and needs to be further assessed. While all studies measured entomological endpoints, only two studies measured the reduction in human dengue cases, with inconclusive results. Conclusions Although pyriproxyfen is highly effective in controlling the immature stages of dengue transmitting mosquitoes, and–to a smaller degree–adult mosquitoes, there is weak evidence for a reduction of human dengue cases. More well designed larger studies with appropriate standardised outcome measures are needed before pyriproxyfen is incorporated in routine vector control programmes. Additionally, resistance to pyriproxyfen has been reported and needs investigation. There is evidence that pyriproxyfen may effectively reduce the density of immature mosquito stages when applied to identified breeding sites. Various formulations are commercially available, and easy to use without a health threat to the user. However, questions remain regarding its use as a single agent in a community setting. Considering its mode of action, it would not be the product of choice for use in an acute outbreak setting. However, for a sustainable community approach, especially slow-release pyriproxyfen formulations seem promising, because they are the longest lasting choice. The analysis suggests, that combination with a second vector control chemical, preferably an adulticide tackling different stages of mosquito development, increases the efficacy of pyriproxyfen and prolongs the duration of a single application. This systematic literature review clearly shows that there is a need for further studies, preferably utilising cluster-randomised controlled (cRCT) designs, to investigate the community effectiveness of pyriproxyfen and to link entomological outcomes to human dengue transmission.
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Affiliation(s)
- Dorit Maoz
- Department of Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Tara Ward
- Public Health Specialist, Accra, Ghana
| | - Moody Samuel
- Institute of Public Health, University of Heidelberg, Heidelberg, Germany
| | - Pie Müller
- Department of Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | | | - Joao Toledo
- Public Health Specialist, Ministry of Health, Brasilia, Brazil
| | - Ross Boyce
- Division of Infectious Diseases, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Raman Velayudhan
- Department for the Control of Neglected Tropical Diseases, World Health Organization, Geneva, Switzerland
| | - Olaf Horstick
- Institute of Public Health, University of Heidelberg, Heidelberg, Germany
- * E-mail:
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Weng JQ, Ali A, Estep A, Becnel J, Meyer SLF, Wedge DE, Jacob M, Rimando AM. Synthesis and Biological Evaluation of 3,5-Dimethoxystilbene Analogs. Chem Biodivers 2016; 13:1165-1177. [DOI: 10.1002/cbdv.201500516] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Accepted: 03/15/2016] [Indexed: 01/12/2023]
Affiliation(s)
- Jian-Quan Weng
- Natural Products Utilization Research Unit; Agricultural Research Service; U.S. Department of Agriculture; P.O. Box 1848 University Mississippi 38677 USA
| | - Abbas Ali
- National Center for Natural Products Research; The University of Mississippi; University Mississippi 38677 USA
| | - Alden Estep
- Mosquito and Fly Research Unit; Center for Medical, Agricultural and Veterinary Entomology; 1600 S.W. 23rd Drive Gainesville Florida 32608 USA
| | - James Becnel
- Mosquito and Fly Research Unit; Center for Medical, Agricultural and Veterinary Entomology; 1600 S.W. 23rd Drive Gainesville Florida 32608 USA
| | - Susan L. F. Meyer
- Nematology Laboratory; Agricultural Research Service; Henry A. Wallace Beltsville Agricultural Research Center - West; U.S. Department of Agriculture; Beltsville Maryland 20705 USA
| | - David E. Wedge
- Natural Products Utilization Research Unit; Agricultural Research Service; U.S. Department of Agriculture; P.O. Box 1848 University Mississippi 38677 USA
| | - Melissa Jacob
- National Center for Natural Products Research; The University of Mississippi; University Mississippi 38677 USA
| | - Agnes M. Rimando
- Natural Products Utilization Research Unit; Agricultural Research Service; U.S. Department of Agriculture; P.O. Box 1848 University Mississippi 38677 USA
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Bouhsira E, Liénard E, Lyazrhi F, Jacquiet P, Varloud M, Deflandre A, Franc M. Repellent and insecticidal efficacy of a combination of dinotefuran, pyriproxyfen and permethrin (Vectra® 3D) against Culex pipiens in dogs. Parasite Epidemiol Control 2016; 1:233-238. [PMID: 29988200 PMCID: PMC5991840 DOI: 10.1016/j.parepi.2016.07.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 05/24/2016] [Accepted: 07/20/2016] [Indexed: 11/19/2022] Open
Abstract
Culex pipiens is an important vector of pathogens of substantial medical and veterinary importance such as Dirofilaria immitis and Dirofilaria repens or the West Nile Virus. The control of these mosquitoes is therefore essential to control the transmission of mosquito-borne agents to humans and animals. A combination of dinotefuran, permethrin and pyriproxyfen (Vectra® 3D) has already shown its efficacy against Aedes aegypti. The aim of this study was to confirm the efficacy of this combination in repelling and killing another species of mosquito, Culex pipiens, after a single topical application to dogs. Twelve adult Beagle dogs with an equal receptivity to mosquitoes were included in the study and divided in two groups of six dogs: an untreated control group and a group treated with a combination containing 54 mg/mL dinotefuran + 4.84 mg/mL pyriproxyfen + 397 mg/mL permethrin (Vectra® 3D). All dogs were challenged with 80 Culex pipiens females for 90 ± 5 min on Days - 28, 1, 7, 14, 21 and 28. The treatment was applied once topically on Day 0. Count and engorgement determination of dead and live mosquitoes were performed after each exposure to treated and untreated dogs. Compared to control dogs, the spot-on formulation provided a repellent efficacy (anti-feeding effect) against mosquitoes of 98.9%, 98.8%, 98.6%, 96.7% and 97.9% on Days 1, 7, 14, 21 and 28 respectively. There was a significant difference (p ≤ 0.05) between the treated and controlled groups on every assessment day. The insecticidal efficacy on treated dogs at 90 min was 34.7%, 50.3%, 39.7%, 22.8% and 11.4% on Days 1, 7, 14, 21 and 28 respectively. There was a significant difference between the treated and controlled groups for live mosquitoes for all assessment days (p < 0.05). A single topical application of a combination of dinotefuran, permethrin and pyriproxyfen showed a significant repellent effect (i.e. > 96%) against Culex pipiens which lasted for 28 days. The results suggest that the Vectra® 3D spot-on solution could be used as an effective mosquito control strategy in dogs and is therefore recommended for use in a dirofilariosis prevention programme.
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Affiliation(s)
- Emilie Bouhsira
- Laboratoire de Parasitologie, Ecole Nationale Vétérinaire de Toulouse, BP, 87614, 23 chemin des capelles, 31076 Toulouse cedex, France
| | - Emmanuel Liénard
- Laboratoire de Parasitologie, Ecole Nationale Vétérinaire de Toulouse, BP, 87614, 23 chemin des capelles, 31076 Toulouse cedex, France
| | - Faouzi Lyazrhi
- École Vétérinaire de Toulouse, Unité pédagogique Biostatistique, 23 chemin des Capelles, F-31076 Toulouse, France
| | - Philippe Jacquiet
- Laboratoire de Parasitologie, Ecole Nationale Vétérinaire de Toulouse, BP, 87614, 23 chemin des capelles, 31076 Toulouse cedex, France
| | - Marie Varloud
- Ceva Santé Animale S. A., 10 Avenue de la Ballastière, 33500 Libourne, France
| | - Audrey Deflandre
- Ceva Santé Animale S. A., 10 Avenue de la Ballastière, 33500 Libourne, France
| | - Michel Franc
- Laboratoire de Parasitologie, Ecole Nationale Vétérinaire de Toulouse, BP, 87614, 23 chemin des capelles, 31076 Toulouse cedex, France
- Corresponding author.
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Ahmed MAI, Vogel CFA. The role of octopamine receptor agonists in the synergistic toxicity of certain insect growth regulators (IGRs) in controlling Dengue vector Aedes aegypti (Diptera: Culicidae) mosquito. Acta Trop 2016; 155:1-5. [PMID: 26672383 DOI: 10.1016/j.actatropica.2015.11.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 11/17/2015] [Accepted: 11/27/2015] [Indexed: 11/16/2022]
Abstract
The synergistic action of octopamine receptor agonists (OR agonists) on many insecticide classes (e.g., organophosphorus, pyrethroids, and neonicotinoids) on Aedes aegypti L. has been reported recently. An investigation of OR agonist's effect on insect growth regulators (IGRs) was undertaken to provide a better understanding of the mechanism of action. Based on the IGR bioassay, pyriproxyfen was the most potent IGR insecticide tested (EC50=0.0019ng/ml). However, the lethal toxicity results indicate that diafenthiuron was the most potent insecticide (LC50=56ng/cm(2)) on A. aegypti adults after 24h of exposure. The same trend was true after 48 and 72h of exposure. Further, the synergistic effects of OR agonists plus amitraz (AMZ) or chlordimeform (CDM) was significant on adults. Among the tested synergists, AMZ increased the potency of the selected IGRs on adults the greatest. As results, OR agonists were largely synergistic with the selected IGRs. OR agonists enhanced the lethal toxicity of IGRs, which is a valuable new tool in the field of A. aegypti control. However, further field experiments need to be done to understand the unique potential role of OR agonists and their synergistic action on IGRs.
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Affiliation(s)
- Mohamed Ahmed Ibrahim Ahmed
- Plant Protection Department, Faculty of Agriculture, Assiut University, Assiut 71526, Egypt; Center for Health and the Environment, One Shields Avenue, University of California, Davis, CA 95616, USA
| | - Christoph Franz Adam Vogel
- Center for Health and the Environment, One Shields Avenue, University of California, Davis, CA 95616, USA; Department of Environmental Toxicology, University of California, One Shields Avenue, Davis, CA 95616, USA.
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Singh S, Kumar K. Effect of juvenoids pyriproxyfen and diofenolan on embryogenesis and postembryonic development of blow fly Chrysomya megacephala (Diptera: Calliphoridae) following egg treatment. Parasitol Res 2015; 114:3213-22. [PMID: 26003811 DOI: 10.1007/s00436-015-4536-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Accepted: 05/06/2015] [Indexed: 11/30/2022]
Abstract
The blow fly Chrysomya megacephala is a serious medico-veterinary pest causing myiasis in humans and animals apart from transmitting various disease-causing pathogens. Being an economically important pest, it warrants successful control in the early stages without affecting the host, environment, and non-target organisms. Juvenoids being safe, species and stage selective, biodegradable, and harmless to beneficial non-target organisms. Treatment of freshly laid eggs of C. megacephala with juvenoids pyriproxyfen and diofenolan (50 and 100 μg/cm(2)) by contact method for 1-60 min severely derailed the embryogenesis and postembryonic development. The results included the following: reduced eclosion, dead, non-viable eggs, undeveloped embryos of various stages, and fully developed embryos entrapped in chorion and unable to eclose. Several latent effects of juvenoids were also observed like larval mortality in the first instar, abnormal pupariation, reduced normal pupariation, formation of pupal-adult mosaics, suppression of adult emergence, and emergence of only deformed adults. Diofenolan was found to be more potent than pyriproxyfen in suppressing embryogenesis. These results show that the juvenoids pyriproxyfen and diofenolan have the potential to be judiciously used along with other bio-rational methods for the successful control of C. megacephala.
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Affiliation(s)
- Satya Singh
- Department of Zoology, University of Allahabad, Allahabad, 211002, Uttar Pradesh, India,
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Singh S, Kumar K. Effects of juvenoid Pyriproxyfen on reproduction and F1 progeny in myiasis causing flesh fly Sarcophaga ruficornis L. (Sarcophagidae: Diptera). Parasitol Res 2015; 114:2325-31. [PMID: 25782684 DOI: 10.1007/s00436-015-4428-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Accepted: 03/06/2015] [Indexed: 11/28/2022]
Abstract
Freshly emerged virgin female Sarcophaga ruficornis were topically treated with different doses of pyriproxyfen to test the efficacy on reproduction and subsequent F1 progeny. The results included mortality of the treated adults, significant reduction in fecundity, more than 90% inhibition in larvae production, mortality in F1 generation during larval instars, reduction in pupariation, and adult emergence and production of deformed adults. There was a dose-dependent response showing high degree of correlation in the doses administered and deformities observed. The effects in F1 generation show that an intraovarial transfer of pyriproxyfen was responsible for the various deformations observed, showing the potency of juvenoid pyriproxyfen for longer durations across generations. This is the first study that clearly demonstrates the efficacy of pyriproxyfen against reproduction in S. ruficornis and its potential for the management of this notorious pest of medico-veterinary importance.
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Affiliation(s)
- Satya Singh
- Department of Zoology, University of Allahabad, Allahabad, 211002, Uttar Pradesh, India,
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