Effect of Toxicity of Silver Nanoparticles on Rice Weevil, (Sitophilus Oryzae)

الملخص

Due to the increasing demand for organic produce and the widespread adoption of rules by businesses to reduce the use of residual chemical pesticides, non-chemical control techniques have become more significant in integrated pest management. Nanomaterial synthesis can be achieved by a variety of methods, such as chemical, biological, and physical processes. To create silver nanoparticles from silver nitrate, the biologically green method was selected. Euphorbia prostrata leaf extracts were used to create silver nanoparticles (Ag NPs), which are a safe, easy-to-manage, and environmentally beneficial green material. In the Laboratory of the Biology Department, Faculty of Education-Derna, temperatures of 32°C, 1°C, and 80 % relative humidity (RH) were used to assess the pesticide activity and determine the efficacies of aqueous leaf extracts of E. prostrata, silver nitrate (AgNO3) solution (1 mM), and synthesized AgNPs against the adult of Sitophilus oryzae L. Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), and UV-visible spectroscopy were used to characterise the synthesised nanoparticles. The size range of the rod-shaped nanoparticles was 25–80 nm, with an average of 52.4 nm. For fifteen days, pesticide bioassay testing was carried out at various concentrations. The lethal concentration (LD50 values) and mortality percentages of Sitophilus oryzae were found to rise with increasing exposure days (up to 15 days) and concentrations of AgNPs (up to 250 μg/ml). According to these findings, synthetic Ag NPs may out to be a perfect environmentally benign method of controlling S. oryzae. This is the first report on the use of synthetic nanoparticles with plant extracts as pesticides.