The effect of repellents Ocimum forskolei and deet on the response of Anopheles stephensi to host odours


Waka, M; Hopkins, RJ; Glinwood, R; Curtis, C; (2006) The effect of repellents Ocimum forskolei and deet on the response of Anopheles stephensi to host odours. Medical and veterinary entomology, 20 (4). pp. 373-376. ISSN 0269-283X DOI: https://doi.org/10.1111/j.1365-2915.2006.00645.x

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Abstract

The behavioural response of Anopheles stephensi Liston (Diptera: Culicidae) to incubated host odours (from human and goat) and to human odour in combination with a repellent plant, Ocimum forskolei (Labiatae), or deet (N, N, diethyl-toluamide) (20%) was tested in a dual-port olfactometer. An. stephensi was significantly attracted to both host odours compared with air alone, but showed no preference when given a choice between both host odours simultaneously. In choice tests, the addition of deet to human odour did not significantly divert mosquitoes to human odour alone, but did divert them to goat odour. O. forskolei combined with human odour diverted mosquitoes to goat or human odour alone. Combinations of human odour and O. forskolei, and human odour and deet were both as unattractive as air alone, and attracted mosquitoes equally when offered simultaneously. The results indicate that use of O. forskolei as a repellent would be beneficial in reducing vector biting if used in communities in areas with partially zoophilic mosquito species such as An. stephensi, and where animals are present.

Item Type: Article
Keywords: Anopheles stephensi, goat odour, human odour, repellent, SEMIFIELD EXPERIMENTAL HUTS, MOSQUITO-REPELLENT, MALARIA VECTORS, WESTERN KENYA, AEDES-AEGYPTI, LACTIC-ACID, HUMAN SWEAT, GAMBIAE, PLANTS, OLFACTOMETER, Animals, Anopheles, drug effects, physiology, Behavior, Animal, drug effects, DEET, pharmacology, Dose-Response Relationship, Drug, Female, Goats, Host-Parasite Relations, Humans, Insect Repellents, pharmacology, Mosquito Control, Ocimum, chemistry, Odors
Faculty and Department: Faculty of Infectious and Tropical Diseases > Dept of Disease Control
Research Centre: Malaria Centre
PubMed ID: 17199748
Web of Science ID: 243428800004
URI: http://researchonline.lshtm.ac.uk/id/eprint/9598

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