title: Adult repellency and larvicidal activity of five plant essential oils against mosquitoes.
abstract: The larvicidal activity and repellency of 5 plant essential oils--thyme oil, catnip oil, amyris oil, eucalyptus oil, and cinnamon oil--were tested against 3 mosquito species: Aedes albopictus, Ae. aegypti, and Culex pipiens pallens. Larvicidal activity of these essentials oils was evaluated in the laboratory against 4th instars of each of the 3 mosquito species, and amyris oil demonstrated the greatest inhibitory effect with LC50 values in 24 h of 58 microg/ml (LC90 = 72 microg/ml) for Ae. aegypti, 78 microg/ml (LC90 = 130 microg/ml) for Ae. albopictus, and 77 microg/ml (LC90 = 123 microg/ml) for Cx. p. pallens. The topical repellency of these selected essential oils and deet against laboratory-reared female blood-starved Ae. albopictus was examined. Catnip oil seemed to be the most effective and provided 6-h protection at both concentrations tested (23 and 468 microg/ cm2). Thyme oil had the highest effectiveness in repelling this species, but the repellency duration was only 2 h. The applications using these natural product essential oils in mosquito control are discussed.
authors.affiliation: MSTRS Technologies Inc, Ames, IA 50010, USA.
authors.forename: Junwei
authors.initials: J
authors.lastname: Zhu
authors.forename: Xiaopeng
authors.initials: X
authors.lastname: Zeng
authors.lastname: Yanma
authors.forename: Ting
authors.initials: T
authors.lastname: Liu
authors.forename: Kuen
authors.initials: K
authors.lastname: Qian
authors.forename: Yuhua
authors.initials: Y
authors.lastname: Han
authors.forename: Suqin
authors.initials: S
authors.lastname: Xue
authors.forename: Brad
authors.initials: B
authors.lastname: Tucker
authors.forename: Gretchen
authors.initials: G
authors.lastname: Schultz
authors.forename: Joel
authors.initials: J
authors.lastname: Coats
authors.forename: Wayne
authors.initials: W
authors.lastname: Rowley
authors.forename: Aijun
authors.initials: A
authors.lastname: Zhang
mesh_terms: D000330:Aedes; D000818:Animals; D002935:Cinnamomum zeylanicum; D003465:Culex; D009033:Culicidae; D005052:Eucalyptus; D005260:Female; D006801:Humans; D007302:Insect Repellents; D007306:Insecticides; D007814:Larva; D027521:Nepeta; D010938:Plant Oils; D046930:Thymus Plant
chemical_list: D007302:Insect Repellents; D007306:Insecticides; D010938:Plant Oils