A letal ovitrap for Aedes aegypti control

SECCACINI, E; JUAN, L. W. ; EISENBERG, P.; LORENZO, M.C.; MASUH, H.; ZERBA, E.; LICASTRO, S

Simposio; 21st Latin American Symposium at the 77th AMCA Annual Meeting; 2011

Ae. aegypti is the main vector of dengue and yellow fever in Latin America. It generally inhabits urban areas (indoors) and deposits its eggs in man-made containers. Ovitraps were developed as a surveillance tool and they have been used for detecting and monitoring vector populations. Only in few cases it was used for vector control, incorporating an insecticide-impregnated strip. The present study evaluates the performance of new designed ovitraps incorporating in the plastic matrix pyriproxyfen as a slow release insecticide that avoid larvae to emerge as adults. Polyethylene films impregnated with 0.1; 0.5 and 1% pyriproxyfen were added to vessels containing water and Ae.aegypti larvae III/IV instar. A 100% adult emergence inhibition was obtained for all the concentrations studied. Films kept in water were active during at least 60 days. The same films used as ovitraps for gravid females produced 100% adult emergence inhibition of the eggs laid on the water. 100% adult emergence inhibition was obtained with ovitraps made of paraffin, estearine or polyethylene containing pyriproxyfen 0.5%. This new ovitrap that releases continuously an insecticide to the water, could be an additional tool for mosquito control, especially when ovitraps remain in the environment as new breeding sites in endemic areas.