Synthesis, Characterization and Investigation of Properties of Nanoemulsion Persian Cumin Essential Oil

The aim of this research is to synthesize and study on a nanoemulsion bio-organic pesticide for higher efficiency and reducing chemical pesticide use. In this research, Persian Cumin essential oil were used, which can be applied as bio-organic pesticide and they are biocompatible, harmless to human beings and also animals; do not cause environmental pollution and agricultural products. Then various parameters of surfactant concentration, essential oil percentage, and sonication time were studied in order to prepare nanoemulsion systems. In order to study on physical stability of different nanoemulsion formulations, optical clarity, viscosity, pH and conductivity were measured. The size and morphology of nanoemulsion formulations were then analyzed by dynamic light scattering (DLS) and transmission electron microscopy (TEM). The results showed that the nanoemulsions in concentration ranges of 1 to 5 % were stable (study during 14 months) and the mean droplets size of synthesized nanoemulsios was about 15 nm. Pesticide experiments showed that contact toxicity LC50 of synthesized nanoemulsion against Aphis gossypii was obtained 3461.91 ppm, which demonstrated a significant increase in pesticide activity with increasing essential oil concentration.