Adulticidal and Repellent Activities of Some Botanical Oils against Malaria Mosquito: Anopheles gambiae (Diptera: Culicidae)

Publication date: Available online 20 September 2017 Source:Beni-Suef University Journal of Basic and Applied Sciences Author(s): Afolabi O. Joseph, Simon-Oke I. Adepeju, Elufisan O. Oluwaloleyeayemi, Oniya M. Oladipo The study is undertaken to determine the adulticidal efficacy and repellent activity of different solvent extracts of Ocimum caninum, Ocimum gratissimum, Chromolaena odorata and Datura stramonium against adult Anopheles gambiae. The extracts showed adulticidal activity at LC50 (0.82-4.58mg/l) and LC90 (2.38-8.33mg/l). The highest mortality was observed in Ocimum gratissimum and Datura stramonium with the LC50 and LC90 values of 2.35mg/l, 4.75ml/l and 0.82mg/l, 2.38mg/l respectively. Meanwhile, the lowest adulticidal activity was recorded in Chromolaena odorata with the lowest LC50 (4.52mg/l) and LC90 (8.32mg/l). The repellent efficacy was determined against the mosquitoes at five concentrations viz 1.0, 2.0, 3.0, 4.0 and 5.0 mg/l under laboratory condition (28±2°C, 75±5% RH, 12L: 12D photoperiod). The results showed complete protections of 90mins for Ocimum caninum, 120mins for Ocimum gratissimum, 30mins for Chromolaena odorata and 120mins for Datura stramonium at 5mg/l of the extracts respectively. It was observed that D. stramonium and O. gratissimum provided highest protection (120mins) against Anopheles gambiae while the least protection (30s) was observed in Chromolaena odorata at 5mg/l. The results of the study showed that all the crude extracts w...
Source: Beni Suef University Journal of Basic and Applied Sciences - Category: Science Source Type: research