LARVICIDAL ACTIVITY OF EGYPTIAN MENTHA PIPERITA AND OCIMUM BASILICUM EXTRACTS AGAINST CULICINE MOSQUITO LARVAE
Ayman A. El-Badry1, Y. A. El-Badry2 and Abeer M.A. Mahgoub 1
1Medical Parasitology Department, Faculty of Medicine, Cairo University, Cairo, Egypt2Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
Mosquito borne diseases are the number one killers. Mosquito control is one of the approaches for control of these diseases. In a search for natural indigenous products that could be used to control these vectors, the insecticidal activity of essential oil extracts of leaves of two medicinal plants; Mentha piperita and Ocimum basilicum, from Giza, Egypt have been tested against the fourth-instar larvae of Aedes and Culex species of mosquitoes. The larval mortality rate of the fourth instar larvae of Aedes and Culex species in 10, 20, 40, 80, and 160 ppm concentrations of the essential oils of leaf extracts of M. piperita after 24h was 50-80% and 52.5-90%, respectively. It was 60-90% and 67.5-100%, respectively using the same concentrations of the essential oil of leaf extract of O.basilicum. The 24 h LC50 value of the leaf extract of M. piperita and O. basilicum for Aedes was higher than that for Culex. The higher larvicidal effect with the lower LC50 values could be taken to suggest that the essential oil leaves extract of M. piperita and O. basilicum could be effectively used for the control of Culex larvae and M. piperita could be effectively used for the control of Aedes larvae.