Preliminary evaluation of the larvicidal activity of extracts and fractions from Ocotea nutans (Nees) Mez against Aedes aegypti

Abstract INTRODUCTION: Aedes aegypti is the main vector of dengue and yellow fever. Recently, the use of plant-sourced larvicides has gained momentum. METHODS: The hydroethanolic extracts and fractions ofOcotea nutansleaves and stems were bioassayed to determine the larvicidal efficacy of these samples. RESULTS: S-HEX (hexane fraction from the crude stem extract) demonstrated high potential for controlling third-stage larvae, with an LC50 of 14.14 µg.mL-1 (concentration required to inhibit 50% of the treated larvae). CONCLUSIONS Extracts from O. nutans were effective against third-stage larvae ofA. aegyptiafter 24 h of exposure.

Bibliographic Details

Main Authors:	Betim,Fernando Cesar Martins, Oliveira,Camila Freitas de, Montrucchio,Deise Prehs, Miguel,Obdulio Gomes, Miguel,Marilis Dallarmi, Maurer,Juliana Bello Baron, Dias,Josiane de Fátima Gaspari
Format:	Digital revista
Language:	English
Published:	Sociedade Brasileira de Medicina Tropical - SBMT 2021
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0037-86822021000100622
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