In vitro studies of inhibitory activity of plant extracts and cow urine on mycelial growth of stem rot, Sclerotimoryzae of rice
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Abstract
Soil borne phytopathogen Sclerotiumoryzae significantly affect rice production. To reduce load of chemical pesticides, antifungal activity of plant extracts and cow urine against mycelial growth of S.oryzaewere tested using poisoned food technique under in vitro condition. Plant extracts of 2.5%, 5.0%, 7.5% and 10% concentration was prepared from Allium cepa, Azadirachtaindica, A. sativum, Ricinuscommunisand Syzygiumcumini. Inhibition of mycelial growth of S.oryzaewas recorded only in case of A. sativum and A. cepa while Azadirachtaindica, Ricinuscommunisand Syzygiumcumini did not show any inhibition of mycelial growth as compared to control. A.sativum plant extracts showed maximum inhibition of mycelia growth of 68.88% at concentration 10% followed by 32.96%, 22.96% and 18.88% at concentration 7.5%, 5.0% and 2.5% resepectively. 22.60%, 19.62%, 17.77% and 8.88% inhibition of mycelial growth as compared to control was recorded at 10%, 7.5%, 5.0% and 2.5% concentration of plant extracts of A.cepa. All the concentration of cow urine inhibited the mycelial growth of S. oryzae. Cow urine at the concentration 5, 7.5 and 10.0 per cent resulted in 100 per cent inhibition of mycelia growth of test pathogen as compared to control. Maximum inhibition of 98.14 per cent was observed at 2.5 per cent concentration followed by 1.25 per cent (63.7%) concentration. This study showed that A.sativum and A.cepa and cow urine possess antifungal activity under in vitro condition. It can also be tested for antifungal activity under in vivo condition.
Article Details
Article Details
Cow urine, Plant extracts, Sclerotiumoryzae
Journal of Plant Protection Research, 50 (3): 239-243
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