Susceptibility of Culicoides species biting midges to deltamethrin‐treated nets as determined under laboratory and field conditions in the Balearic Islands, Spain
2014
Río, R. del | BARCELÓ, C. | PAREDES‐ESQUIVEL, C. | LUCIENTES, J. | Miranda, M. A.
Culicoides Latreille (Diptera: Ceratopogonidae) are vectors of several arboviruses, including bluetongue virus (BTV) and African horse sickness virus (AHSV), which cause diseases in, respectively, sheep and cattle, and horses, and have economic repercussions mainly as a result of trade restrictions. Insecticides can be used to reduce vector populations and hence the spread of disease. Despite the economic importance of these diseases, relatively few studies have evaluated the efficacy of commercially available insecticides and the effectiveness of treated nets against Culicoides species. The aim of the present study was to evaluate the insecticidal effect of commercially available polyethylene nets (ZeroVector®) treated with deltamethrin (4.4 g/kg ± 15%) on Culicoides species. Laboratory and field trials were conducted in Culicoides populations collected in Majorca in the Balearic Islands, Spain. The present study shows that deltamethrin‐treated nets provoke high and rapid mortality (90–100%) in Culicoides midges under laboratory conditions and increase mortality by 13% when deployed in the field.
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