Influence des matières végétales et des engrais NPK sur la biologie de aedes aegypti (dlptera: Culicidae)

Abstract

In this laboratory study, we investigated the attractiveness of gravid Aedes aegypti females for aquatic habitats containing either NPK fertilizer or plant matter or u mixture of both. The development of larvae, adult emergence and weight of emerged adults were measured for each group and physicochemlcal analysis of water was made for the dosage of minerals and orgunlc compounds. After 23 days experiment, NPK solution remained as attractive as the mixture of NPK + plant matter but did not ensure suitable development of larvae. The plant matter infusion showed less attractiveness for laying eggs than NPK but provided larvue with sufficient organlc nutrients for their development. The combination of both NPK + plant matter provided the greatest attractiveness for gravid femoles and sufficient organic substance allowlng mosquito larvae to grow. Physlcochemicul analyses of water containing NPK showed minerals only (NH 4++NO3-+P+K) whereas plant matter showed high content of carbon and nitrogen. The NPK + plant matter mixture contained both organic and minerals elements that favoured the proliferation of bacteriu and then the development of mosquito larvue. These findings could lead to the development of new traps that could attract females mosquitoes and killed hatched larvae if mix with appropriute larvlcldes.