Larvicidal activity of Brunfelsia uniflora extracts on Aedes aegypti larvae

The aim of this study was to evaluate the chemical composition and the larvicidal activity of leaf and flower extracts against larvae. Twenty-four compounds were found in the leaf extract, and the major compounds were phytol (23.1%), 9,12,15-octadecatrienoic acid, ethyl ester (21.3%), and hexadecano...

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Bibliographic Details
Published in:Natural product research 2022-02, Vol.36 (4), p.1031-1037
Main Authors: Sugauara, Elaine Yae Yamashita, Sugauara, ElisângelaYumi, Sugauara, Rosângela Rumi, Bortolucci, Wanessa de Campos, Fernandez, Carla Maria Mariano, Gonçalves, José Eduardo, Colauto, Nelson Barros, Gazim, Zilda Cristiani, Linde, Giani Andrea
Format: Article
Language:English
Subjects:
Aedes
Aedes aegypti
Animals
Brunfelsia uniflora
Chemical composition
Ethyl esters
Flowers
Gas chromatography
Gas Chromatography-Mass Spectrometry
Insecticides - chemistry
Larva
Larvae
Larvicides
Leaves
Linalool
Mass spectrometry
Mass spectroscopy
Mosquitoes
Palmitic acid
Phytol
Plant extracts
Plant Extracts - chemistry
Plant Leaves - chemistry
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Summary:The aim of this study was to evaluate the chemical composition and the larvicidal activity of leaf and flower extracts against larvae. Twenty-four compounds were found in the leaf extract, and the major compounds were phytol (23.1%), 9,12,15-octadecatrienoic acid, ethyl ester (21.3%), and hexadecanoic acid, ethyl ester (12.8%). In the flower extract, twenty-four compounds were also identified and the major compounds were -amyrin (35.7%), -amyrin (16.4%), and ( )-geranyl linalool (9.6%) by gas chromatography coupled to mass spectrometry. The larvicidal activity was evaluated by larval immersion test. The lethal concentrations (LC) obtained from leaf extract were LC = 4.89 and LC = 11.14 mg/mL and from flower extract were LC = 3.82 and LC = 11.03 mg/mL, and the positive control presented LC = 0.40 and LC = 1.14 mg/mL. Thus, extracts are promising alternatives to control larvae.
ISSN:1478-6419
1478-6427
DOI:10.1080/14786419.2020.1844685