Insecticidal Efficacy of Geranium Oil Nanoemulsion and Synergism with Sesame Oil and their Acetylcholinesterase Inhibition
Insecticidal Efficacy of Geranium Oil Nanoemulsion and Synergism with Sesame Oil and their Acetylcholinesterase Inhibition
Shawky M Aboelhadid1*, Abdel-Azeem S Abdel-Baki2, Khaled M Hassan3,
Samar M Ibrahium4, Saleh Al-Quraishy5, Ahmed O Hassan6 and Asmaa A Kamel1
ABSTRACT
Nowadays, many studies have been carried out to develop new eco-friendly alternatives consequently, the essential oils (EOs) have acquired more interest due to their insecticidal activities, low harmfulness, and rapid degradation in the environment. Following this approach, herein we tried to improve the insecticidal activities of Pelargonium graveolens (G) through using the geranium oil in nano-emulsion (GN) form and in combination with sesame seed oil (SO). Different concentrations ranged from 0.313 to 10% were prepared from GN and the combination of G with S and tested for their larvicidal and pupicidal activities against Musca domestica and Culex pipiens, while their adulticidal activities were tested against red flour beetle Tribolium castaneum. The LC50 of G alone was 4.29% against house fly larvae. The values of LC50 decreased to 1.50% for GN and 0.32% for the combination of G+S. GO and GN form induced (pupal toxicity) 100% inhibition rate (PIR) in the treated housefly pupae at the concentration of 10%. Meanwhile, GO+SO combination showed 100% PIR at the concentration of 2.5%. Furthermore, the LC50 for GO, GN and GO+SO was 0.22, 0.19 and 0.079 % respectively against larvae of C. pipiens, while it was 1.04 % for sesame oil. Regarding the contact and fumigant assays against adult T. castaneum, the combination of G and S achieved the best results when compared with GO alone or GN form. All treatments exhibited inhibition in the activity of acetylcholinesterase enzyme in the house fly larvae 24h post application. In addition, all the treatments induced significant increase in the malondialdehyde activity. In conclusion, nanoemulsion tech and mixing GO+SO increased their insecticidal potency against house fly, C. pipiens and T. castenum. This is a useful method in the integrated pest management.
To share on other social networks, click on any share button. What are these?
