Larvicidal, adulticidal and repellent effects of Kaempferia galanga.
Southeast Asian J Trop Med Public Health
;
1999 Sep; 30(3): 470-6
Artigo
em Inglês
| IMSEAR
| ID: sea-32380
ABSTRACT
Four fractions of Kaempferia galanga (hexane fraction, dichloromethane fraction 1, dichloromethane fraction 2 and methanolic fraction) were tested for larvicidal activity toward fourth instar Culex quinquefasciatus. The hexane fraction was found to exhibit the highest larvicidal effect with the LC50 of 42.33 ppm. Testing for adulticidal activity, the hexane fraction did not show any promising adulticidal effect. However, it caused a knockdown effect which might be useful as a repellent. It was then tested for repellent activity in human volunteers both in laboratory and field studies. In a laboratory study, the hexane fraction possessed repellency against Aedes aegypti (ED50 value of 30.73 microg/cm2), and provided biting protection for 3 hours. In a field study, it could protect against certain mosquitos, ie, Armigeres subalbatus, Anopheles barbirostris, An. aconitus, Mansonia uniformis, Cx. quinquefasciatus, Cx. gelidus, Cx. tritaeniorhynchus and Ae. aegypti. The hexane fraction did not cause dermal irritation when applied on human skin.
Texto completo:
DisponíveL
Índice:
IMSEAR (Sudeste Asiático)
Assunto principal:
Humanos
/
Masculino
/
Medicamentos de Ervas Chinesas
/
Extratos Vegetais
/
Controle de Mosquitos
/
Análise de Regressão
/
Aedes
/
Culex
/
Repelentes de Insetos
/
Inseticidas
Tipo de estudo:
Estudo diagnóstico
Idioma:
Inglês
Revista:
Southeast Asian J Trop Med Public Health
Ano de publicação:
1999
Tipo de documento:
Artigo
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