| Autor: |
Silva ALD; Universidade Federal de São João Del-Rei, Divinópolis, Minas Gerais, Brazil., Azevedo LS; Universidade Federal de São João Del-Rei, Divinópolis, Minas Gerais, Brazil., Gonçalves TPR; Universidade Federal de São João Del-Rei, Divinópolis, Minas Gerais, Brazil., Coimbra MC; Universidade Federal de São João Del-Rei, Divinópolis, Minas Gerais, Brazil., Siqueira EP; Centro de Pesquisa René Rachou - Fiocruz/MG, Laboratório de Química de Produtos Naturais, Belo Horizonte, Minas Gerais, Brazil., Alves SN; Universidade Federal de São João Del-Rei, Divinópolis, Minas Gerais, Brazil., Lima LARDS; Universidade Federal de São João Del-Rei, Divinópolis, Minas Gerais, Brazil. |
| Abstrakt: |
Culex quinquefasciatus (Diptera: Culicidae) is responsible for the transmission of lymphatic filariasis. The search for natural sources of new insecticides to control mosquitoes has intensified in recent years. Tecoma stans is an exotic species in Brazil, known as 'ipê de jardim'. T. stans pericarps were extracted with hexane in Soxhlet apparatus, and fatty acids (FA) and methyl esters (FAME) were obtained by transesterification reaction of hexane extract (HE). HE, FA, and FAME were evaluated against 3 rd. and 4 th. instar larvae of Culex quinquefasciatus . Analysis by gas chromatography-mass spectrometry (GC/MS) identified the hydrocarbon nonacosane (81.69%) as the major compound in HE, and linolenic (16.89%), linoleic (16.83%), and palmitic acids (21.00%) were predominant in FA. FA and HE, at a concentration of 250 µg/mL, promoted mortality of 81.67% and 68.66% of larvae, respectively. HE and FA obtained from T. stans pericarps have larvicidal potential for the control of C. quinquefasciatus . |
