Effect of Extracts of Ocimum Gratissmum L. (Scent Leaves) on Some Mosquitoe Genera in Makurdi Metropolis, Benue Nigeria
Journal Title: International Journal of Zoology and Animal Biology - Year 2020, Vol 3, Issue 3
Abstract
Ocimum gratisimum is a plant with so many uses-culinary, medicinal, pesticidal, insecticidal, aesthetic. This research was designed to find out repellence, knockdown and knock-dead activity of hot and cold aqueous and ethanol crude extracts against mosquitoes of three genera-Culex, Aedes and Anopheles sp. Ocimum gratisimum leaves were harvested from different locations in Makurdi. Leaves were picked, washed, and dried crispy for seven (7) days under shade. Crispy dried leaves were grinded into fine powder. The powdered was weighed and divided into four equal parts. Each part was subjected to hot and cold aqueous and ethanol extraction. Extracts were concentrated with rotatory evaporator. Concentrates where allowed to dry in the open at room temperature. 2, 3 and 5g of extracts were weighed and used to make different concentrates; each in 5ml of Absolute ethanol. These concentrates were tested against lab bred mosquitoes for repellency, knockdown and mortality, using the World Health Organization Pesticide Evaluation Scheme. The results showed complete repellence to all extract types, increased knock down with increased concentration and variable mortalities to the different extract methods. Based on these, Ocimum gratissimum extracts can be used locally and as an alternative to synthetic chemicals in the production biodegradable and eco-friendly mosquito repellent, and “mosquitocidal” formulations.
Authors and Affiliations
Victor Ugochukwu OBISIKE* Ameh Godswill OMALE and Elizabeth U AMUTA
Keywords
Related Articles
- EP ID EP748113
- DOI 10.23880/izab-16000229
- Views 33
- Downloads 0
Horse Breeds of Nepal
This article is a review on the horse breeds of Nepal. The contents in this article is obtained from google books, blogs, online articles and conference papers. Information about indigenous horse breeds on Nepal is limi...
Trend of Changes in Annual Forest Cover of South West Bengal, India
With 21% of India's area under forests, and regular biennial satellite remote monitoring, there is an urgent need for rapid automated detection of forest loss locations. There have been numerous studies monitoring fores...
Global Use of Face Masks for Victory against Covid-19
The use of the face mask always reduces the transmission of COVID-19 rapidly. This article is written on some things those are related COVID-19 and absolutely face mask. Here we discussed little about transmission proce...
Proceeding of the International Workshop on Awareness for Conservation and Sustainable Use of Biodiversity in India (IWACASBI’17)
The mega event of Two Days ‘International Workshop on Awareness for Conservation and Sustainable Use of Biodiversity in India’ was held in joint collaboration of Thiruvalluvar University and National Biodiversity Aut...
Bioremoval of Cadmium using the Bacterial Strain, Pseudomonas Oleovorans MTCC 617 (Pseudomonadales, Pseudomonadaceae)
Biosorption can be an effective technique for the treatment of heavy metal bearing waste water resulting from human and industrial activities. Several Gram positive and negative bacteria have the ability to remove the h...