Larvicidal activity of Pereskia bleo (kunth) dc. (cactaceae) fruit endocarp crude and fractionated extracts against Aedes aegypti (L.) (Diptera: culicidae)
Autor(es): Thongwat, Damrongpan; Ganranoo, Lucksagoon;Chokchaisiri, Ratchanaporn
Resumo: In this study, the endocarp of Pereskia bleo (Kunth) DC. fruit was extracted with distilled water and ethanol. Crudes and fractionated groups of the extracts were evaluated for their larvicidal efficacy against the 3rd instar larvae of Aedes aegypti. At 48 hours of exposure, it was found that the activities of the extracts were higher than 24-hour's. The ethanolic extracts showed stronger activities than the aqueous ones, indicating the lower LC sub( 50) values of both crude and fractionated group extracts. The most toxic activity was found in a fractionated group of the ethanolic extract, E-Gr3, with significantly lowest LC sub( 50) values of 707.94 and 223.12 ppm for 24- and 48-hour detection times, respectively. The bioassay results indicated the larvicidal property against the Ae. aegypti mosquito of the P. bleo plant extracts. A safety for non-target organisms or an action on other mosquito vectors of this plant, should be further investigated.
Palavras-Chave: Instars; Bioassays; Distilled water; Pesticides; Larvae; Pest control; Hosts; Aquatic insects; Public health; Fruits; Vectors; Plant extracts; Ethanol; Cactaceae; Aedes aegypti; Pereskia; Culicidae; Diptera
Imprenta: Southeast Asian Journal of Tropical Medicine & Public Health, v. 45, n. 6, p. 1292-1300, 2014.
Descritores: Aedes aegypti - Public health
Data de publicação: 2014
