How do species, population and active ingredient influence insecticide susceptibility in Culicoides biting midges (Diptera: Ceratopogonidae) of veterinary importance?

Venail Roger, Lhoir Jonathan, Fall Moussa, Del Rio R., Talavera Sandra, Labuschagne M., Miranda Miguel, Pagès Nonito, Venter Gert J., Rakotoarivony Ignace, Allene Xavier, Scheid Bethsabée, Gardes Laëtitia, Gimonneau Geoffrey, Lancelot Renaud, Garros Claire, Cetre-Sossah Catherine, Balenghien Thomas, Carpenter Simon, Baldet Thierry. 2015. How do species, population and active ingredient influence insecticide susceptibility in Culicoides biting midges (Diptera: Ceratopogonidae) of veterinary importance?. Parasites and Vectors, 8 (439), 9 p.

Quartile : Q1, Sujet : PARASITOLOGY

Résumé : Background Culicoides biting midges are biological vectors of internationally important arboviruses of livestock and equines. Insecticides are often employed against Culicoides as a part of vector control measures, but systematic assessments of their efficacy have rarely been attempted. The objective of the present study is to determine baseline susceptibility of multiple Culicoides vector species and populations in Europe and Africa to the most commonly used insecticide active ingredients. Six active ingredients are tested: three that are based on synthetic pyrethroids (alpha-cypermethrin, deltamethrin and permethrin) and three on organophosphates (phoxim, diazinon and chlorpyrifos-methyl). Methods Susceptibility tests were conducted on 29,064 field-collected individuals of Culicoides obsoletus Meigen, Culicoides imicola Kieffer and a laboratory-reared Culicoides nubeculosus Meigen strain using a modified World Health Organization assay. Populations of Culicoides were tested from seven locations in four different countries (France, Spain, Senegal and South Africa) and at least four concentrations of laboratory grade active ingredients were assessed for each population. Results The study revealed that insecticide susceptibility varied at both a species and population level, but that broad conclusions could be drawn regarding the efficacy of active ingredients. Synthetic pyrethroid insecticides were found to inflict greater mortality than organophosphate active ingredients and the colony strain of C. nubeculosus was significantly more susceptible than field populations. Among the synthetic pyrethroids, deltamethrin was found to be the most toxic active ingredient for all species and populations. Conclusions The data presented represent the first parallel and systematic assessment of Culicoides insecticide susceptibility across several countries. As such, they are an important baseline reference to monitor the susceptibility status of Culicoides to current insecticides and also to assess the toxicity of new active ingredients with practical implications for vector control strategies.

Mots-clés Agrovoc : Culicoides, résistance aux insecticides, insecticide, efficacité d'utilisation, vecteur de maladie, cyperméthrine, deltaméthrine, perméthrine, composé organophosphoré, mécanisme de défense, contrôle de maladies, méthode de lutte, lutte anti-insecte, Culicoides nubeculosus

Mots-clés géographiques Agrovoc : Europe, Afrique, France, Espagne, Afrique du Sud

Mots-clés complémentaires : Culicoides obseletus, Culicoides imicola

Classification Agris : L72 - Organismes nuisibles des animaux
L73 - Maladies des animaux

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

Auteurs et affiliations

• Venail Roger, EID (FRA)
• Lhoir Jonathan
• Fall Moussa, ISRA (SEN)
• Del Rio R., UIB (ESP)
• Talavera Sandra, CReSA (ESP)
• Labuschagne M., University of the Free State (ZAF)
• Miranda Miguel, UIB (ESP)
• Pagès Nonito, UAB (ESP) ORCID: 0000-0001-6020-7175
• Venter Gert J., ARC (ZAF)
• Rakotoarivony Ignace, CIRAD-BIOS-UMR CMAEE (FRA)
• Allene Xavier, CIRAD-BIOS-UMR CMAEE (FRA)
• Scheid Bethsabée, EID (FRA)
• Gardes Laëtitia, CIRAD-BIOS-UMR CMAEE (FRA)
• Gimonneau Geoffrey, CIRAD-BIOS-UMR CMAEE (SEN) ORCID: 0000-0002-0613-841X
• Lancelot Renaud, CIRAD-BIOS-UMR CMAEE (FRA)
• Garros Claire, CIRAD-BIOS-UMR CMAEE (FRA) ORCID: 0000-0003-4378-5031
• Cetre-Sossah Catherine, CIRAD-BIOS-UMR CMAEE (REU)
• Balenghien Thomas, CIRAD-BIOS-UMR CMAEE (FRA)
• Carpenter Simon, Institute of Animal Health (GBR)
• Baldet Thierry, CIRAD-BIOS-UPR Contrôle des maladies (FRA) ORCID: 0000-0003-2979-9517

Source : Cirad-Agritrop (https://agritrop.cirad.fr/577232/)

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