Abstract

MUY-RANGEL, María Dolores et al. In vitro antifungal activity of garlic essential oil (Allium sativum L.) against Alternaria tenuissima. Rev. mex. fitopatol [online]. 2018, vol.36, n.1, pp.162-171. ISSN 2007-8080.  https://doi.org/10.18781/r.mex.fit.1708-3.

Due to the environmental problems generated by the chemical control of phytopathogenic fungi, it is necessary to look for alternatives for their control. The essential oil of garlic may be a viable alternative for the control of A. tenuissima. In this study, the volatile compounds of garlic essential oil were analyzed by Gas Chromatography-Mass Spectrometry. Radial growth in vitro and biomass of A. tenuissima in presence of the garlic essential oil. Diallyl disulphide and diallyl sulphide were identified in 23.64 and 20.33%, respectively, among other compounds in a smaller proportion. At a concentration of 1000 ppm, the radial growth and biomass production were inhibited 100 and 86.20%, respectively, it compared with control PDA-Tween® 80 without oil. The medium and minimum inhibitory concentrations obtained for A. tenuissima were 229 and 1, 023 ppm, respectively. The spore germination of the fungus was inhibited 88.89% with medium minimum concentration and 94.17% with minimum inhibitory concentration. Garlic essential oil showed antifungal capacity against A. tenuissima, inhibiting spore germination, radial growth and biomass production.

Keywords : control; spore germination; fungal biomass.

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