Abstract
Many investigations has been done on the efficacy of botanicals against various pest and diseases of crops but there is paucity of information on benefit cost ratio of their application. In the present study five indigenous botanicals extracts of Solanum incanum, Allium hookerii, Mariandra benghalensis and Flogacanthus thyrsiflorus, the indigenous plants of Manipur have been used against the brown spot disease of rice caused by Helminthosporium oryzae. The analysis of benefit cost ratio (BCR) recorded maximum value of BCR in Millettia pachycarpa (1.45:1) followed by Solanum incanum (1.36:1), Allium hookerii (1.33:1), Mariandra benghalensis (1.30:1) and Flogacanthus thyrsiflorus (1.26:1) and in Control (1.13:1). It was found that in treatment M. Pachycarpa an investment of Re.1.00 will generate a gross income of Rs.1.45 or net return (Rs.0.45) and net return for following treatment S. incanum (Rs. 0.36), A. hookerii (Rs.0.33), M. Benghalensis (Rs. 0.30) and F. thyrsiflorus (0.26) as compared to low net return in Control (Rs.0.13).
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