Antifungal activity of various essential oils againstRhizoctonia solaniandMacrophomina phaseolinaas major bean pathogens

• DOI: 10.1111/jam.12730
• Publication Date: 2014-12-19T09:07:48Z
• Authors: N. Khaledi; P. Taheri; S. Tarighi
• Keywords: Macrophomina phaseolina; Rhizoctonia

Aims The main objective of this study was to investigate the effect various essential oils (EOs) decrease activity cell wall degrading enzymes (CWDEs) produced by fungal phytopathogens, which are associated with disease progress. Also, seed treatment and foliar application peppermint EO its constituent, menthol, on diseases caused two necrotrophic pathogens bean investigated. Methods Results Antifungal EOs Rhizoctonia solani Macrophomina phaseolina, as pathogens, evaluated. Mentha piperita, Bunium persicum Thymus vulgaris revealed highest antifungal against fungi. M. piperita had lowest minimum inhibitory concentration (MIC) for R. among three tested. This pathogen did not grow in presence B. T. at 850, 1200 1100 ppm concentrations, respectively. MIC phaseolina fungus concentrations 975, 950 1150 ppm, Hyphae exposed showed structural changes. Activities cellulase pectinase, CWDEs decreased low without growth. Seed and/or menthol significantly reduced development both Higher capability than decreasing observed. Conclusions Reducing CDWEs is a mechanism EOs' compared observed only vitro but also vivo. Significance Impact Study Effect involved pathogenesis described first time. Menthol can be used botanical fungicide control destructive bean.