The Evaluation of Silver Nanoparticles Prepared by Oily Eucalyptus Camaldulensis on Some Aspects of Sitophilus Oryzae

Abstract

The present study aims to evaluate the efficacy of silver nanoparticles prepared from oil extracts of the Eucalyptus camaldulensis plant as an alternative to using chemical pesticides against Sitophilus oryzae, which is one of the most dangerous stored pests that cause significant economic losses. The extract was employed at concentrations of 30, 20, and 10μg/ml. The formation of silver nanoparticles (EOEc-AgNPs) by Eucalyptus camaldulensis was investigated using UV spectroscopy. The following steps were covered in the current study: adult at age of 24 hours, 2nd larval, and eggs. The extract EOEsc-AgNPs was shown to be effective against Sitophilus oryzae. The largest percentage of eggs that mortality resulted in was 80.4 % at 30μg/ml and 10g/ml, the percentage drops to 66.2 percent. While there was no evidence of egg mortality in the control treatment. In addition, the maximum death rate for 2nd larvae were 75.4 percent at 30μg/ml and fell to 56.6 percent at 10μg/ml, whereas no mortality was seen in the control treatment. In the control adults, the greatest killing percentage was 60.2 percent at 30μg/ml and 44.3 percent at 10μg/ml, but no mortality was observed in the control test.