Autor(es): Arjunan, Naresh Kumar; Murugan, Kadarkarai; Rejeeth, Chandrababu; Madhiyazhagan, Pari; Barnard, Donald R.

Resumo: A biological method was used to synthesize stable silver nanoparticles that were tested as mosquito larvicides against Aedes aegypti, Anopheles stephensi, and Culex quinquefasciatus. Annona squamosa leaf broth (5%) reduced aqueous 1 mM AgNO3 to stable silver nanoparticles with an average size of 450 nm. The structure and percentage of synthesized nanoparticles was characterized by using ultraviolet spectrophotometry, X-Ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy methods. The median lethal concentrations (LC50) of silver nanoparticles that killed fourth instars of Ae. aegypti, Cx. quinquefasciatus, and An. stephensi were 0.30, 0.41, and 2.12 ppm, respectively. Adult longevity (days) in male and female mosquitoes exposed as larvae to 0.1 ppm silver nanoparticles was reduced by similar to 30% (p < 0.05), whereas the number of eggs laid by females exposed as larvae to 0.1 ppm silver nanoparticles decreased by 36% (p < 0.05).

Palavras-Chave: Biosynthesis; Larvicidal; Pupicidal; Silver nanoparticles

Imprenta: Vector-Borne and Zoonotic Diseases, v. 12, n. 3, p. 262-268, 2012

Identificador do objeto digital: 10.1089/vbz.2011.0661

Descritores: Aedes aegypti - Biosynthesis ; Aedes aegypti - Larvicide ; Aedes aegypti - Dengue ; Aedes aegypti - Public health

Data de publicação: 2012

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