Effects of Some Aromatic Plant Extracts on Curvularia lunata Wakker Isolated from Brassica oleracea L.

Abstract

The extracts of five medicinal plants viz. Azadirachta indica, Ocimum sanctum, Allium sativum, Tagetus patula and Lantana camara, were assessed in-vitro for antifungal activity against Curvularia lunata Wakker. Pathogenecity test was then confirmed. The assessment of fungitoxicity was carried out by poisoned food technique using six different concentrations (0, 20, 40, 60, 80, and 100%) of above mentioned plant’s extract against the test fungus in terms of percentage of mycelial growth inhibition. Among the test plants, the extracts of Ocimum sanctum, Azadirachta indica and Lantana camara were found to be effective in the control of the mycelial growth of Curvularia lunata.

The inhibitory effect of these concentrations of used plant extracts were found significant at 1% and 5% level of significance with a high degree of negative correlations against mean colony diameter of the test fungus. The highest correlation coefficient value for the case was found to be - 0.98 in case of Ocimum sanctum and that of the lowest value for the same was found to be -0.847 in case of Tagetus patula.

After the experiment, the order of effectiveness of used plant extracts was reported in the form of: Os > > Ai ≥ Lc >> As > Tp.