Association of Culicidae larvae and effectiveness of 0.4% S-methoprene Mosquilarv in reducing Aedes density in southern Benin

Abstract

This study evaluated the efficacy of Mosquilarv containing 0.4% S-methoprene in reducing population densities of Aedes spp. Oviposition traps treated with 1.5 mg Mosquilarv granules containing 0.4% S-methoprene and untreated controls were placed in houses where natural breeding sites of Aedes spp. are often found traps were collected 7 days later, eggs were counted and kept under rearing conditions until complete emergence of larvae in control traps and death or emergence of larvae in traps treated with 0.4% Mosquilarv. Our results show a predominance of the Aedes vector species collected in Porto-Novo and Ifangni. Ae. aegypti and Ae. albopictus share the same ovitraps. The results revealed a considerable reduction in emergence in treated ovitraps, ranging from 64.42% to 93.53%. Mosquilarv with 0.4% S-methoprene showed interesting results in reducing the density of Aedes spp vectors and could be considered as a response and prevention tool for possible dengue epidemics in Benin.