Abstract
The synthesis of silver nanoparticles (AgNPs) using plant extracts is fulfilled and considered as ecofriendly method. The Aedes aegypti mosquito is a vector of several diseases in humans like yellow fever and dengue. There is no specific treatment for dengue. Its prevention and control solely depend on effective vector control measures. The purpose of this study was to investigate the larvicidal activity of the ethanol leaf extracts of Rhazya stricta and synthesized silver nanoparticles against 4th instar larvae of Ae. aegypti. The experimented excuse was according to the WHO protocols. R. stricta and Synthesized silver nanoparticles (AgNPs).
Particles were characterized by analyzing the excitation of surface plasmon resonance (SPR) using UV-vis spectrophotometer and FT-IR spectra. Further TEM analysis confirmed the range of particle of nanoparticles. Our results showed a high efficiency of the R. stricta extract where the fatal concentration is for 50 % of the population (LC50) (323,447 ppm). Moreover, with addition of the silver nano partials the (LC50) was 91,342 ppm. The nanoparticles were more lethal against 4th instar larvae of Ae. aegypti by about 3.46 folds. These results suggest that the synthesized AgNPs of R. stricta have the potential to be used as an ideal eco-friendly compound for the control of the Ae. aegypti larvae.