Ecofriendly Control of The Filarial Vector, Culex pipiens (Diptera; Culicidae) Using Green Synthesized Silver Nanoparticles | ||||
| Egyptian Academic Journal of Biological Sciences. A, Entomology | ||||
| Volume 17, Issue 3, September 2024, Page 51-67 PDF (910.06 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/eajbsa.2024.374781 | ||||
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| Authors | ||||
| Mohamed A. Ahmed1; Kotb M. Hammad1; Mohamed A. Awad1; Amr Fouda2 | ||||
| 1Department of Zoology and Entomology, Faculty of Science, Al-Azhar University, Cairo 11884, Egypt. | ||||
| 2Department of Botany and Microbiology, Faculty of Science, Al-Azhar University, Cairo 11884, Egypt. | ||||
| Abstract | ||||
| Nanotechnology is a trend that highly advanced over the past thirty years, addressing and resolving more challenges across different fields. In this investigation, biogenic silver nanoparticles (Ag-NPs) were formed using Brevibacillus agri as an endophytic bacterial strain and utilized as a safe approach to control the spread of medical insect, Culex pipens. The formed Ag-NPs were characterized by UV-vis analysis that showed maximum surface plasmon resonance at a wavenumber of 420 nm. Fourier transforms infrared analysis exhibits the role of various biomolecules in bacterial filtrate reduction and capping as-formed NPs. The sizes of biogenic NPs were 20 – 50 nm with spherical shapes with weight and atomic percentages of Ag ions of 46.20% and 13.96% respectively as shown by SEM-EDX analysis. The crystalline structure was confirmed by XRD. The mortality of various instar larvae and pupae of C. pipens were concentration-dependent and showed maximum percentages of 88.4±0.95, 76.3±0.8, 69.6±1.1, 52.1±1.4, and 47.3±1.01% for first to fourth instar larvae and pupae respectively at a concentration of 30 ppm. The concentrations of proteins, carbohydrates, and lipids of III instar larvae were decreased from (172.1 ± 4.31, 118.1±4.6, and 463.1±1.32 µg/g) for the control to (54.2±1.72, 91.3±2.17, 204.6±9.31 µg/g) respectively upon treatment with 30 ppm of Ag-NPs. | ||||
| Keywords | ||||
| Biogenic; Ag-NPs; Culex pipens, larvicidal | ||||
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