Repellent properties of various essential oils and synthetic and natural products against Culicoides nubeculosus and C. obsoletus (Diptera: Ceratopogonidae), vectors of Orbivirus

Lachance S., Baldet Thierry, Balenghien Thomas, Rakotoarivony Ignace, Lhoir Jonathan, Venail Roger, Garros Claire. 2012. Repellent properties of various essential oils and synthetic and natural products against Culicoides nubeculosus and C. obsoletus (Diptera: Ceratopogonidae), vectors of Orbivirus. In : E-sove 2012 : from biology to integrated control in a changing world. Abstract book. European Society for Vector Ecology, CIRAD, EID, IRD. Montpellier : European Society for Vector Ecology, Résumé, 188. Conférence E-SOVE. 18, Montpellier, France, 8 Octobre 2012/11 Octobre 2012.

Résumé : Control of animal arbovirus transmission by Culicoides biting midges vectors is almost exclusively performed using pour-on pyrethroid insecticides on ruminants. Alternative strategies to synthetic insecticides, such as repellent essential oils, should be developed. Biting midges were exposed to various essential oils (geranium, lavender, lemongrass, lemon-eucalyptus, peppermint, tea tree), other natural (Neem) or synthetic (DEET) repellents, and deltamethrin diluted in ethanol. The tests were performed by applying the products to the membrane of an artificial blood-feeding unit (Hemotek) for laboratoryreared C. nubeculosus and a sugar solution for C. obsoletus, due to unsuccessful engorgement on the feeding unit of wild caught individuals. Blood-feeding on ethanol-treated control was about 70% for C. nubeculosus. Immediately following application, DEET at 5 and 20%, lemongrass (Cymbopogon citratus) and geranium (Pelargonium asperum) at 5% were consistently superior to the other products at repelling C. nubeculosus from blood-feeding. Two hours after application, the blood-feeding inhibition of most of the products declined sharply. DEET and deltamethrin caused significant mortality compared to the control. For field collected C. obsoletus, engorgement on sugar solution was variable but usually ranged from 40 to 50% for the control. DEET, lemongrass and geranium repelled 100% of the biting midges from sugar feeding for one hour. Mortality was significant for DEET, deltamethrin and lemongrass. The effective dose to protection was determined for lemongrass, geranium and deltamethrin. (Texte intégral)

Classification Agris : L72 - Organismes nuisibles des animaux
Q60 - Traitement des produits agricoles non alimentaires

Auteurs et affiliations

• Lachance S., University of Guelph (CAN)
• Baldet Thierry, CIRAD-BIOS-UMR CMAEE (FRA) ORCID: 0000-0003-2979-9517
• Balenghien Thomas, CIRAD-BIOS-UMR CMAEE (FRA) ORCID: 0009-0008-4495-4814
• Rakotoarivony Ignace, CIRAD-BIOS-UMR CMAEE (FRA) ORCID: 0009-0002-3480-6734
• Lhoir Jonathan, CIRAD-BIOS-UMR CMAEE (FRA)
• Venail Roger, EID (FRA)
• Garros Claire, CIRAD-BIOS-UMR CMAEE (FRA) ORCID: 0000-0003-4378-5031

Source : Cirad - Agritrop (https://agritrop.cirad.fr/566194/)

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