Abstract: Metal nanoparticles have demonstrated strong toxicity against mosquitoes across all life stages and present a promising avenue of research to address the growing development of insecticide resistance in mosquito populations. In this study, nanoparticles were synthesized from silver nitrate using essential oils from different plants. Toxicity screening of these nanoparticles were then conducted via topical applications to assess their viability as standalone insecticides and for potential synergism with existing insecticides.