Browsing by Author "Bhattarai, Bina"

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    Antifungal effects of some plant essential oils against Alternaria alternata (Fr.) Keissl. and Aspergillus niger van Tiegh. from grapes
    (2015) Bhattarai, Bina; Sanjay Kumar Jha
    The essential oil of six plants viz. Murraya koenigii (L.) Spreng., Eucalyptus citriodora Hook., Artemisia indica Willd., Cinnamomum camphora (L.) J. Presl., Cinnamomum tamala (Buch.-Ham.) Nees and Eberm and Lantana camara L. were assessed in vitro for the antifungal activity against Alternaria alternata (Fr.) Keissl. and Aspergillus niger van Tiegh., causing postharvest rots in grapes. The test fungi were isolated from infected grapes obtained from local markets. The essential oils were extracted through hydro distillation process using Clevenger oil extracting apparatus. For screening of antifungal activity treatments at concentration of 20, 40, 80, 160 and 320 µl/ml and controls were set to determine percentage inhibition of mycelial growth of two test fungi using poisoned food technique. All the tested oils exhibited significant antifungal effect (P<0.05) over tested fungi. Among all six essential oils, Cinnamomum camphora showed the most effective antifungal activity against Aspergillus niger which inhibited the mycelial growth by 81.58 % and 100 % at 20 and 80 µl/ml oil concentration respectively. Furthermore, Cinnamomum tamala showed best antifungal effect in controlling Alternaria alternata among all six oils which inhibited the mycelial growth by 93.11 % at 20 µl/ml and by 100 % at 80 µl/ml oil concentrations.