Bioefficacy of Organic Extracts of Ocimum basilicum against Sitophilus zeamaisOuko RO*, Koech SC, Arika WM, Njagi SM, Oduor RO and Ngugi MP
Department of Biochemistry and Biotechnology, School of Pure and Applied Sciences, Kenyatta University, Nairobi, Kenya
- *Corresponding Author:
- Ouko RO
Department of Biochemistry and Biotechnology
Kenyatta University, P.O. Box 43844-00100, Nairobi, Kenya
E-mail: [email protected]
Received Date: January 22, 2017; Accepted Date: February 08, 2017; Published Date: February 15, 2017
Citation: Ouko RO, Koech SC, Arika WM, Njagi SM, Oduor RO, et al. (2017) Bioefficacy of Organic Extracts of Ocimum basilicum against Sitophilus zeamais. Entomol Ornithol Herpetol 6:190. doi: 10.4172/2161-0983.1000190
Copyright: © 2017 Ouko RO, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Ocimum basilicum plant extracts in methanol, hexane and methanol: hexane solvent blend were evaluated for their fumigant toxicities, repellent and adult emergence inhibition activities against Sitophilus zeamais. Twenty grams of maize were used for each treatment and four different extract concentrations of 25, 50, 75 and 100% were tested for their activities. The highest mortality (100%) was observed after 72 h at 100% O. basilicum blend extract concentration. The methanolic extract recorded mortality rates of 74.36% at highest concentration while 78% mortality was true for hexane extract at 96 hours with 100% extract concentration. The three different solvents extracts of O. basilicum recorded high repellent and new adult emergence inhibition activities comparable to actellic (reference pesticide). In conclusion, blend extract of O. basilicum was the most effective in maize weevil control and therefore can be used in formulating eco-friendly bio-pesticide against S. zeamais.