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https://locus.ufv.br//handle/123456789/19698
Tipo: | Artigo |
Título: | Larvicidal activity of essential oil of Peumus boldus Molina and its ascaridole-enriched fraction against Culex quinquefasciatus |
Autor(es): | Castro, Débora Silva Borges de Silva, Denise Brentan da Tibúrcio, Jacqueline Domingues Sobral, Marcos Eduardo Guerra Ferraz, Vany Taranto, Alex Gutterres Serrão, José Eduardo Siqueira, João Máximo de Alves, Stênio Nunes |
Abstract: | Culex quinquefasciatus (Say, 1823), known as the domestic mosquito, is a common and abundant species throughout the world, and a cosmopolitan species. The adults of this mosquito are important in terms of public and animal health since they display adaptability to different hosts. In humans, they are responsible for the transmission of various diseases. One manner of control of this vector is the use of insecticidal or larvicidal products, which may have the drawback of toxicity to mammals and can be harmful to the environment. The present work evaluated the larvicidal potential of the essential oil (EO) and ascaridole-enriched fraction (EF4-5) obtained from the leaves of Peumus boldus Molina (boldo). The EO, obtained by steam distillation, was analyzed by GC/MS and fractionated on silica gel. EO and EF4–5, containing 31.4% and 89.5% ascaridole, respectively, were evaluated against C. quinquefasciatus at concentrations of 100, 50 and 25 μg/ml on the third and fourth instars. They showed lethal concentrations (LC50) of 82.14 and 41.85 μg/ml, respectively. Larvae treated with the EF4-5 showed morphological changes in the midgut, with cells possessing a cytoplasm that contained small vacuole-like structures, as well as a nucleus with decondensed chromatin and a cell apex with a short brush border. The cells of the fat body showed larger protein granules, which were acidophilic relative to the larvae of the control group. Moreover, the enriched fraction at a dose of 50 μg/ml showed a residual larvicidal effect according to exposure time on C. quinquefasciatus. This residual effect deserves consideration, since a long-term larvicidal product may be a useful tool for vector control. |
Palavras-chave: | Larvicidal Culex quinquefasciatus Peumus boldus Essential oil Ascaridole |
Editor: | Experimental Parasitology |
Tipo de Acesso: | Elsevier Inc. |
URI: | https://doi.org/10.1016/j.exppara.2016.10.008 http://www.locus.ufv.br/handle/123456789/19698 |
Data do documento: | 1-Nov-2016 |
Aparece nas coleções: | Artigos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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artigo.pdf Until 2100-12-31 | Texto completo | 1,29 MB | Adobe PDF | Visualizar/Abrir ACESSO RESTRITO |
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