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Revista Brasileira de Plantas Medicinais

versão impressa ISSN 1516-0572versão On-line ISSN 1983-084X

Resumo

GONCALVES, A.H.; PEREIRA, A.S.; SANTOS, G.R.S.  e  GUIMARAES, L.G.L.. Fungitoxicity in vitro of essential oils from Lippia sidoides Cham., Cymbopogon citratus (D.C.) Stapf. and their major constituents in the control of Rhizoctonia solani and Sclerotium rolfsii. Rev. bras. plantas med. [online]. 2015, vol.17, n.4, suppl.3, pp.1007-1015. ISSN 1516-0572.  http://dx.doi.org/10.1590/1983-084x/14_166.

The objective of this study was to evaluate the fungitoxic potentials of the essential oils of Cymbopogon citratus, Lippia sidoides, and of its major constituents, on the mycelial growth of phytopathogens Rhizoctonia solani and Sclerotium rolfsii. The chemical characterization of L. sidoides oil showed the presence of carvacrol (33.27%) and of 1,8-cineole (24.41%) as its major components, whereas citral (77.6%) was the major constituent of C. citratus essential oil. The evaluation of the fungitoxic potential of the essential oils and of its major constituents was performed through in vitro assays, the microorganisms mycelial growth inhibition. Both essential oils totally inhibited the mycelial growth of R. solani at 400 µg mL-1. Regarding the major constituents, the 1,8-cineole did not show fungitoxic effect at the concentrations evaluated. However, the carvacrol and the citral were more effective than the essential oils and there was no mycelial growth of R. solani and of S. rolfsii at the concentrations of 200 µg mL-1 and 225 µg mL-1, respectively.

Palavras-chave : Phaseolus vulgaris L.; carvacrol; citral; alternative control.

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