ANTIFUNGAL ACTIVITY OF BOTANICALS AGAINST SAROCLADIUM ORYZAE CAUSING RICE SHEATH ROT DISEASE

T Meera, P Balabaskar
2012 International Journal of Food, Agriculture and Veterinary Sciences   unpublished
Rice sheath rot caused by Sarocladium oryzae to be a major constraints in rice production .Since the existing chemical control measures being costly and may favour development of resistance in pathogens. The potential alternative methods have been explored in the present studies. Forty plant extracts were tested against Sarocladium oryzae. Among these, Spharanthus indicus, Lawsonia inermis, Brassica campestris, Jatropha curcas, Ricinus communis and Cymbopogan citrates did not showed any effect.
more » ... Among all the plant extracts Eugenia caryophyllata and Eucalyptus globules exhibited strong fungitoxicity at 50% concentration. Followed by, Acorus calamus and Cinnamon zylanicum. Pavonia zylanica exhibited least inhibition of pathogens. Out of the plant extracts tested, selectively 10 plant extracts which showed promising results were further evaluated at different concentrations (2%, 4%, 6%, 8% and 10%) against S. oryzae. In the present study, among the various plant extracts Eugenia caryophyllata and Eucalyptus globules at 10% concentration were observed to be the most effective in inhibitory the mycelial growth, bio-mass production, spore germination and germ tube length of the pathogen under in vitro condition.
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