antifungal and antibacterial potentiality of six essential oils extracted from plant source.

Abstract

In vitro evaluation of six essential oils viz., Allium sativum, Capsicum annum Cassia fistula, Coriandrum sativum, Cuminum cyminum and Curcuma longa were tested against ten seed borne fungi of paddy viz., Pyricularia oryzae, Bipolaris oryzae, Alternaria alternata, Tricoconis padwickii, Drechslera tetramera, Drechslera halodes, Curvularia lunata, Fusarium moniliforme, F. oxysprorum and F. solani and five human pathogenic bacteria viz., Escherichia coli, Pseudomonas aeruginosa, Salmonella typhi ,Vibrio cholera and Streptococcus pneumonia at 500,1000,1500 and 2000 ppm concentration. Among the six essential oils, A. sativum recorded a complete inhibition in eight fungi compared to control. A. sativum is followed by C. sativum , C. longa and C. cyminum . No significant activity was observed in C. annum and C. fistula against all the test fungi. In antibacterial assay, A. sativum recorded a maximum inhibition of all test bacteria in the range of 10.9 to36.9 mm, followed by C. longa (5.6 -25.6 mm), C. cyminum (10.9-30.2 mm). Least inhibition was observed in Capsicum annum and no antibacterial activity was observed in C. fistula.