Journal of Biopesticide

Journal of Biopesticide

2009, Vol. 2, Issue1

EFFICACY OF PHYTOEXTRACTS AND OILS OF CERTAIN MEDICINAL PLANTS AGAINST CERCOSPORA MORICOLA COOKE., INCITANT OF MULBERRY (MORUSALBA L.) LEAF SPOT


AUTHOR(S)
C. Raja Gopal Reddy* R.S.Nirmala and CH. Ramanamma**

ABSTRACT

Certain phytoextracts and plant oils were treated in vitro for their antifungal efficacy against the growth of Cercospora moricola Cooke, the incitant of leaf spot of Mulberry (Morus alba L.). Highest mycelial growth inhibition (72.59%) was recorded in Eucalyptus globules with 10% concentration. The next best plant extracts are, Oscimum sanctum (49.08%), Phyllanthus emblica (46.75%), Aloe barbedensis (45.75%), Allium sativum L. (41.08%) and Azadirachta indica (35.25%). Plant oils viz., Madhuca indica oil (3%) Cymbopogon citratus oil (0.05%) and neem oil (3%) also inhibited the mycelial growth of the fungus with 75.73%, 73.22% and 24.44% respectively, when compared to control. All the tested phytoextracts showed more or less inhibitory effect on mycelial growth on dry weight basis. Growth inhibition ranged from 49.24% to 60.12%. Significantly, the highest inhibition was recorded in Eucalyptus globules (10%) with 60.12%, followed by Aloe barbedensis (57.37%),Oscimum sanctum (56.40%), Phyllanthus emblica (54.26%), Allium sativum L.(51.68%) and Azadirachta indica (50.81%). In case of oils, neem oil (3%) showed highest per cent inhibition (40.44%), when compared to Madhuca indica oil (3%) with 40.23% and Cymbopogon citratus – (0.05%) with 30.62%.


DOI
https://doi.org/10.57182/jbiopestic.2.1.77-83

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