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Under laboratory conditions using dual culture techniques, bio-control agents (Trichoderma viride, T. harzianum, Pseudomonas fluorescens and Bacillus subtilis) were tested against Bipolaris oryzae the causal organism of brown spot of rice. Maximum inhibition (65.33 %) of mycelial growth of B. oryzae was caused by T. harzianum, followed by T. viride (57.76%) and P. flourescens (32.68%). | Management of brown spot of rice (Oryza sativa L.) caused by bipolaris oryzae by bio-control agents