Resumo

OSPINA, Daniel I et al. In vitro evaluation of the inhibitory activity of essential oils from Lippia origanoides H.B.K. on mycelial growth and sclerotial production of Sclerotium cepivorum Berk.. Acta Agron. [online]. 2011, vol.60, n.4, pp.306-311. ISSN 0120-2812.

Essential oils obtained from leaves and flowers of different samples of Lippia origanoides cultivated under the environmental conditions of the Cauca Valley, Colombia, were tested in vitro against mycelial growth and sclerotial formation in Sclerotium cepivorum, the pathogen responsible for onion white rot. All the evaluated oils in concentrations ranging from 250 to 1350 µL/L exhibited inhibitory activity against both the mycelium and sclerotia of the pathogen. However, those corresponding to the chemotype I (minimum inhibitory concentration, MIC = 120 µL/L) reached the strongest inhibition results regarding the evaluated pathogen structures. Hence, the chemotype I of L. organoides can be said to have potential inhibitory activity against onion white rot.

Palavras-chave : Antifungical activity; essential oils; Lippia origanoides; onion; Sclerotium cepivorum.

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