Almeida BJW, Rocha MI, Silva RA, Ferreira MG, Vinuto SL, Dantas SJ, Bezerra SV, de Menezes DD, Barbosa FGMA, de Oliveira RS, dos Santos LT, Cardoso TH, Mendes SS, da Silva MN, Vieralves LK

Language: English
References: 20
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ABSTRACT

Introduction: Verbenaceae stand out among the botanical taxa containing species rich in essential oils. One species from this taxon, Lantana montevidensis (Spreng.) Briq., commonly known as trailing lantana, is characterized by containing monoterpenes and sesquiterpenes, essential oils with biological activity.
Objective: identify the chemical constituents of L. montevidensis essential oil and evaluate their insecticidal activity against Nauphoeta cinerea.
Method: L. montevidensis leaves were collected, dried and subjected to hydrodistillation. Chemical characterization was then performed by gas chromatography / mass spectrometry. For the biological assay against cockroaches, 20-day-old nymphs were selected and subjected to various concentrations (50 - 1 000 μg/ml of oil airborne), mortality being evaluated throughout 24 hours of exposure to the EO. Ethanol (C2H6O) was used as positive control.
Results: the study found that L. montevidensis oil has low insecticidal action, since mortality was only 10% in the 500 μg/ml group, whereas in the positive control group it was 95% at a 500 μg/ml concentration. Regarding the chemical composition of the oil, a total 22 constituents were found, two of which prevailed: β-caryophyllene (33.72%) and germacrene D (31.98%).
Conclusion: L. montevidensis displays insecticidal activity and contains sesquiterpene compounds.

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