Susceptibility status of Aedes aegypti (L.) (Diptera: Culicidae) to temephos in Venezuela
Autor(es): Alvarez, Leslie C.; Ponce, Gustavo; Oviedo, Milagros; Lopez, Beatriz; Flores, Adriana E.
Resumo: Temephos is an insecticide widely used in Venezuela to control the proliferation of the larvae of Aedes aegypti (L.), the principal vector of dengue virus. The aim of this study was to identify the susceptibility to temephos of Ae. aegypti in four locations in western Venezuela: Lara, Tres Esquinas, Urena and Pampanito. Larval bioassays were conducted on samples collected in 2008 and 2010, and the levels of alpha - and beta -esterases, mixed-function oxidases, glutathione-S-transferase and insensitive acethyl cholinesterase were determined. Larval populations from western Venezuela obtained during 2008 and 2010 were found to be susceptible to temephos, with low resistance ratios and without overexpression of enzymes. The low RR values reveal the effectiveness of temephos in controlling the larval populations of Ae. aegypti. Control strategies must be vigorously monitored to maintain the susceptibility to temephos of these populations of Ae. aegypti.
Palavras-Chave: Insecticides; Bioassays; Insect larvae; Pest control; Hosts; Disease transmission; Enzymes; Vectors; Glutathione transferase; Cholinesterase; Dengue virus; Urena; Aedes aegypti; Culicidae; Diptera
Imprenta: Pest Management Science, v. 70, n. 8, p. 1262-1266, 2014.
Descritores: Aedes aegypti - Virus ; Aedes aegypti - Transmission ; Aedes aegypti - Dengue ; Aedes aegypti - Public health
Data de publicação: 2014
