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 34
- Downloads 0
New Results in Researching the Relationship between Light Trapping of Ostrinia nubilalis Hbn. and Some Features of Night Sky and the Moon in Hungary and USA
This paper treads with the certain features of night sky and the Moon in connection with the success of light trap catch of European Corn-borer (Ostrinia nubilalis Hübner, 1790) in Hungary and Nebraska and North Carolin...
Toxicity Test of Sea Cucumber Bohadschia sp Extract from the South East Sulawesi Coastal Waters Indonesia against Carp Fish (Cyprinus carpio Linn)
Sea cucumber is believed to have antimicrobial and immunostimulating active metabolites which can be utilized in aquaculture, though it requires a toxicity test before it is applied to aquatic organisms. The purpose of...
Insects New Source of Allergens for Animals and Human
This paper describes non-hymenoptera insects which are a potential source of allergens for sensitive people. Described species can also be a source of allergens to animals. It also presents the possibility of onset of c...
Birds and Mammals of the Wakha Valley in Northern India
Ladakh in northern India harbours a diverse assemblage of birds and mammals. The species in the region show close affinity with the Palaearctic bio-geographic realm. We conducted a survey on mammals and birds in the Wak...
Use of Habitat and Activity Patterns of Pionus menstruus and Amazona farinosa (Aves: Psitacidae) in a Tropical Dry Forest in Toluviejo, Sucre, Colombia
To determine the use of the habitat and the patterns of daily activity of two species of psittacids, present in a tropical dry forest in a town in the Montes de María, we make direct observations through point counts, a...