UNIDEF   23986
UNIDAD DE INVESTIGACION Y DESARROLLO ESTRATEGICO PARA LA DEFENSA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
First determination of lethal and sublethal effects of temephos on Anopheles pseudopunctipennis in comparison with Aedes aegypti
Autor/es:
AGUSTÍN ALVAREZ COSTA; HÉCTOR MASUH; PAULA VALERIA GONZALEZ; LAURA HARBURGUER
Lugar:
Orlando
Reunión:
Congreso; XXV International Congress of Entomology; 2016
Institución organizadora:
Entomological Society of America
Resumen:
Malaria and the Dengue Fever are the most important vector borne diseases and their main vectors in Latin-America are Anopheles pseudopunctipennis (Theobald) and Aedes aegypti (L.) respectively. Vector control studies are focused mainly on the lethal dose of the insecticides; however their sublethal effects may have important implications on activities related to establishing their vectorial capacity.In this work we evaluated the larvicidal and sublethal effects of temephos on Anopheles pseudopuntipennis, using Aedes aegypti as reference. The larvicidal bioassay was performed according to a protocol previously used in our laboratory after which we used probit regression to obtain de LC50. To determinate the sublethal effects, we evaluated the behavior of those larvae that survive to temephos exposure. We monitored each larvae throughout a 10 minute time course with a video-camera. We used the video-tracking software (Ethovision XT10.1) to calculate behavioral variables. Linear regression analyses were carried out between the behavior variables versus the concentration of insecticide. The LC50 values were higher in An. pseudopunctipennis than in Ae. aegypti. In Ae. aegypti, the variables studied had significant correlations with the concentration of temephos, some variables (Velocity, Distance, Rotations and Time of Higly Mobile and Mobile) had negative correlations while the others (Time Immobile and Angular Velocity) presented positive correlations. The same tendency was observed in An. pseudopunctipennis. The study of susceptibility and sublethal effects of insecticides are important to improve the chemical control of An. pseudopunctupennis, understanding the potencial effect on the foraging and evasion behavior of its larvae.