ANTAGONISTIC EFFECT OF ESSENTIAL OILS AGAINST PATHOGENIC STORAGE FUNGI OF COWPEAA.K. SARMA, M.R. DEVI AND A. NIGAM
The effect of essential oil extracted from the clove (Scyzigum aromaticum), eucalyptus (Eucalyptus obliqua), ginger (Zingiber officinale) and peppermint (Mentha piperita) were tested under in vitro condition for their inhibitory effect against twenty numbers of pathogenic fungi isolated from one year stored cowpea (Vigna unguiculata) seeds at different concentrations (0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09 and 0.1%). The antifungal activities of the oils were assessed by evaluating the percentage of infected grains. It was recorded that the tested oils showed inhibitory effect against the pathogenic storage fungi. The fungi were also responded to the concentration of the oil, i.e. high concentration showed high inhibition. The antifungal activity of the essential oils at 0.02, 0.04, 0.06, 0.08 and 0.1% concentration was also studied under in vivo condition. Results showed that, application of these oils decreases the incidence of pathogenic storage fungi. It was recorded that, number of fungi appeared at 0.1% concentration was significantly less. Among the essential oils, the strongest antifungal activity was exhibited by ginger oil.
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