Ovicidal Efficacy of Silver Nanoparticle against Vectors MOSQUITOS

Vector control is a critical requirement in epidemic disease situations, as is an urgent need to develop new and improved mosquito control methods that are economical and the environment. Mosquitoes transmit serious human diseases, causing millions of deaths every year. Use of synthetic insecticides to control vector mosquitoes has caused physiological resistance and adverse environmental effects in addition to high operational cost. Insecticides of botanical origin may serve as suitable alternative biocontrol techniques in the future. In view of the recently increased interest in developing plant origin insecticides as an alternative to chemical insecticide, in the present study, the Ovicidal activity of silver nanoparticles (AgNPs) synthesized using Sida acuta plant leaf extract against eggs of Anopheles stephensi, Aedes aegypti, and Culex quinquefasciatus was determined. The range of concentrations of synthesized AgNPs (20, 40, 60, 80, and 120 μg mL−1) and aqueous leaf extract (75,150,225,300,375 and 450 μg mL−1) were tested against the adults of A. stephensi, A. aegypti, and C. quinquefasciatus. Eggs were exposed to varying concentrations of aqueous leaf extract and synthesized AgNPs for 24 h. Considerable mortality was evident after the treatment of S. acuta for all three important vector mosquitoes. The synthesized AgNPs from S. acuta were highly toxic than aqueous leaf extract to three important vector mosquito species. In this recorded from UV–visible spectroscopy, Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy analysis (EDX), and Transmission electron microscopy (TEM). These results suggest that synthesized silver nanoparticles are a rapid, eco-friendly, and single-step approach; the AgNPs formed can be potential mosquito Ovicidal agents.