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2023-01-01
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LARVICIDAL ACTIVITY OF VEGETABLE OILS AND ESTERIFIED COMPOUNDS AGAINST CULEX QUINQUEFASCIATUS (DIPTERA: CULICIDAE)
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Universidade Federal de São João del-Rei. Divinópolis, MG, Brazil
Universidade Federal de São João del-Rei. Divinópolis, MG, Brazil
Universidade Federal de São João del-Rei. Divinópolis, MG, Brazil
Universidade Federal de São João del-Rei. Departamento de Medicina. São João del-Rei, MG, Brazil
Universidade Federal de São João del-Rei. Divinópolis, MG, Brazil
Instituto Federal de Educação, Ciência e Tecnologia do Espírito Santo. Itatiba, ES, Brazil
Fundação Oswaldo Cruz. Instituto René Rachou. Laboratorio de Produtos Naturais. Belo Horizonte, MG, Brazil
Universidade Federal de Viçosa. Departamento de Biologia Geral. Viçosa, MG, Brazil
Universidade Federal de São João del-Rei. Divinópolis, MG, Brazil
Universidade Federal de SãoJoão del-Rei. Divinópolis, MG, Brazil
Universidade Federal de São João del-Rei. Divinópolis, MG, Brazil
Universidade Federal de São João del-Rei. Divinópolis, MG, Brazil
Universidade Federal de São João del-Rei. Departamento de Medicina. São João del-Rei, MG, Brazil
Universidade Federal de São João del-Rei. Divinópolis, MG, Brazil
Instituto Federal de Educação, Ciência e Tecnologia do Espírito Santo. Itatiba, ES, Brazil
Fundação Oswaldo Cruz. Instituto René Rachou. Laboratorio de Produtos Naturais. Belo Horizonte, MG, Brazil
Universidade Federal de Viçosa. Departamento de Biologia Geral. Viçosa, MG, Brazil
Universidade Federal de São João del-Rei. Divinópolis, MG, Brazil
Universidade Federal de SãoJoão del-Rei. Divinópolis, MG, Brazil
Abstract
Control of Culex quinquefasciatus using chemical insecticides may result in the selection of resistant mosquito strains. Thus, the use of plant-derived products has been studied as alternative for the mosquito control. Fatty acid methyl esters (FAMEs) obtained by transesterification of vegetable oils may result in compounds with larvicidal potential against C. quinquefasciatus. However, little is known about the morphological, physiological or biochemical effects that these FAMEs may have on mosquito larvae. The present study reports the effects of these FAMEs in mosquito larvae. The FAMEs were obtained by transesterification of canola, corn, sunflower, and soybean oils with acid catalysis and the determination of FAMEs composition was done by gas chromatography-mass spectrometry (GC-MS). Larvae of C. quinquefasciatus were exposed to different concentrations of the vegetable oils and FAMEs. Thereby, different FAMEs showed LC50 values ranging from 42.32 to 196.27mg/L against C. quinquefasciatus larvae. The methyl ester obtained from sunflower oil showed the lowest LC50. Histology of C. quinquefasciatus larvae exposed to LC50 of FAMEs was performed and changes in the midgut and fat body morphology were identified. Therefore, larval mortality and changes in the internal organs suggested that FAMEs might be a promising new class of larvicidalcompounds. Cytotoxicity of FAMEs compounds was assessed with the HeLa human cell line and no effect was observed.
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