Repellent activity of Cnidoscolus phyllacanthus Mart. and Ricinus communis L. extracts against Aedes aegypti L. oviposition behavior

Authors

  • Lafayette Pereira Candido University Federal of São Carlos, São Carlos-SP, Brazil.
  • Eduardo Barbosa Beserra State University of Paraiba, Campina Grande-PB, Brazil.

DOI:

https://doi.org/10.5007/2175-7925.2015v28n4p105

Abstract

Female Aedes aegypti lay their eggs on nearly any moist substrate. Methods with potential to repel oviposition may reduce infestation, thereby contributing to control of epidemics. We evaluated the influence of Cnidoscolus phyllacanthus and Ricinus communis plant extracts on the oviposition behavior of A. aegypti. Lethal concentrations were first determined in experiments with larvae after 24 h of exposure, after which LC50 and LC90 were used to test oviposition repellency. The experiment consisted of an oviposition preference test based multiple-choice and no-choice assays. The Oviposition Activity Indices (OAIs) from the multiple-choice test using both R. communis and C. phyllacanthus were negative, suggesting oviposition repellent and deterrent activity. The LC90 of both plant extracts deterred oviposition by this vector, as demonstrated by an OAI = value of -1. In the choice study, mean oviposition values were significantly different between R. communis and C. phyllacanthus. In the absence of choice, mosquitoes laid eggs independent of the substrate. In conclusion, our OAI values indicate that all substrates used repelled oviposition by A. aegypti.

 

Author Biographies

Lafayette Pereira Candido, University Federal of São Carlos, São Carlos-SP, Brazil.

Department of Botany, Laboratory of germination and ecophysiology of seeds.

Eduardo Barbosa Beserra, State University of Paraiba, Campina Grande-PB, Brazil.

Entomology Laboratory at the Center for Systematic and Bioecology, Department of Biology.

Downloads

Published

2015-09-23

Issue

Vol. 28 No. 4 (2015)

Section

Artigos

License

After the electronic publication of the manuscript, the authors are entitled, without any restriction, on its contents.

License Creative Commons Atribuição 4.0 Internacional - CC BY

 Licença Creative Commons

Authors are able to take on additional contracts separately, non-exclusive distribution of the version of the paper published in this journal (ex.: publish in institutional repository or as a book), with an acknowledgment of its initial publication in this journal.