SciELO - Scientific Electronic Library Online

 
vol.81 issue1Survey of Enterobacteriaceae in domestic ducks (Cairina moschata) from properties located in four cities of the state of Ceará, BrazilPhysical-chemical and microbiological aspects of the rennet cheese sold in the Northeast States of Brazil author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Arquivos do Instituto Biológico

On-line version ISSN 1808-1657

Abstract

LIMA, Rafaela Karin et al. Chemical composition and toxicity of essential oils to the green-aphid Schizaphis graminum (Rondani, 1852). Arq. Inst. Biol. [online]. 2014, vol.81, n.1, pp.22-29. ISSN 1808-1657.  http://dx.doi.org/10.1590/S1808-16572014000100005.

The aim of this study was to assess the chemical composition of essential oils of Illicum verum, Ageratum conyzoides,Piper hispidinervumand Ocotea odorífera, as well as their toxicity to the green-aphid Schizaphis graminum. Compound identification was carried out with gas chromatography + mass spectrometry, and quantification with gas chromatography + flame ionization detector, both with DB5 column. The hydrodistillation process promoted oil yield of 3.81% for I. verum; 0.46% for A. conyzoides; 2.85 % for P. hispidinervum;and 0.68 % for O. odorífera. The major components from the oils of A. conyzoides was precocene (87.0%) and (E)-caryophyllene (7.1%); (E)-anethol (90.4%), limonene (2.6%) and methyl-chavicol (1.3%) for I. verum; methyleugenol (81.2%) and safrole (10.6%) for O. odorifera; and safrole (82.5%) and α-terpinolene (13.4%) for P. hispidinervum. The acute toxicity test (24 hours) performed by contact in sorghum leaves or contaminated filter-paper showed that the higher toxicity occur with essential oils of A. conyzoides, with LC50of 7.01 and 7.01 µg oil/cm2, respectively; followed by O. odorifera, with LC50 of 17.10 and 66.70 µg oil/cm2, respectively; I. verum, with LC50of 66.40 and 65.40 µg oil/cm2, respectively; and low toxicity was observed for the P. hispidinervum essential oil, with LC50 of 64.00 and 143.00 oil/cm2, respectively. With the results obtained in this research, we can state that the use of these essential oils can be a new tool in integrated pest management.

Keywords : Illicum verum; Ageratum conyzoides; Piper hispidinervum; Ocoteaodorífera; aromatic compounds; insecticidal activity; Aphididae.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf )