Adult repellency and larvicidal activity of five plant essential oils against mosquitoes
Autor(es): Zhu, Junwei; Zeng, Xiaopeng; Yanma; Liu, Ting; Qian, Kuen; Han, Yuhua; Xue, Suqin; Tucker, Brad; Schultz, Gretchen; Coats, Joel; Rowley, Wayne; Zhang, Aijun
Resumo: 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 mu g/ml (LC90 = 72 mu g/ml) for Ae. aegypti, 78 mu g/ml (LC90 = 130 mu g/ml) for Ae. albopictus, and 77 mu g/ml (LC90 = 123 mu g/ml) for C.y. 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 mu g/cm(2)). 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.
Palavras-Chave: Essential oils; Mosquitoes; Aedes albopictus; Ae. aegypti; Culex pipiens pallens; repellency; Larvicides
Imprenta: Journal of the American Mosquito Control Association, v. 22, n. 3, p. 515-522, 2006
Identificador do objeto digital: 10.2987/8756-971X(2006)22[515:ARALAO]2.0.CO;2
Descritores: Aedes aegypti - Larvicide
Data de publicação: 2006
