Benefit: Cost Ratio (BCR) analysis of Botanical extracts against Brown spot disease of rice caused by Helminthosporium oryzae (Breda de Haan)

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). References 1.Arivudainambi, S.; Selvamuthukumaran, T.;  Baskaran, P Efficacy of herbal extracts in management of amaranth leaf caterpillar. Int.J.Veg.Sci. 2010, 16: 167-173. Aziz, M.A.; UI Hasan, M.; Ali, A.; Iqbal, J Comparative efficacy of different strategies for management of spotted bollworms, Earias spp .on Okra, Abelmoschus esculentus (L). Moench. Pak. J. Zool. 2012, 44: 1203-1208. Bedi, K.S.; and Gill, H.S. Losses caused by the brown leaf spot disease in the Punjab. Indian Phytopath . 1960, 13: 161-164. Blankson, W.; Amoabeng, Geoff M. Gurr.; Catherine W. Gitau.; Philip C. Stevenson Cost:         benefit analysis of botanical insecticide use in cabbage: Implications for      small holder farmers in developing countries. Crop Protection. 2014, 57: 71-76.  Datnoff E. L.; and Lentini, S. Richard Brown spot in Florida Rice. 1994, 128                Devi. O.; Jitendiya. D and Chhetry, G.K.N Evaluation of antifungal properties of certain plants against Drechlera oryzae causing brown leaf spot of rice in Manipur valley, Int.J.of Scientific & Res.Publications. 2013, 3(5) 1-3. Chavan, R.T.; Deshmukh, V.L and Kadam, A.S Antibacterial activity of Cassia toria leaves. Recent Research in Science and Technology. 2011, 3(5): 12-14. Gaichui, G Studies on efficacy of plant extracts and used of panchagavya against wilt disease of Chilli caused by Fusarium oxysporum, M.Sc.(Agri.) Thesis submitted to COA, CAU, Imphal.  2008, 54-65. Khalili, E.; Sadravi, M.; Naeimi, S. and Khosravi,V Biological control of rice brown spot with native isolates of three Trichoderma species. Braz. J. Microbiol. 2012, 43: 297-305. Khus, N Assessment of organic and inorganic fertilization and plant density on production potential of rice-rice- cropping system. Madras Agric. J. 2011, 85 (12): 604-607. Oerke, E. C., Dehne D. W., Schonbeck F and Weber A Crop production and crop protection:     estimated losses in major food and cash crops.  Elsevier Hardcover, Amsterdam. 1994, 830. Pundir, R. K and Jain, P. Comparative studies on the antimicrobial activity of black paper (Piper nigrum) and turmeric (Curcumalonga) extracts. Int. J. of Applied Bio. and Pharmaceutical Techno. 2010, 1(2): 491-501. Shabozoi, N.U.K.; Abro, G.H.; Syed, T.S and Awan, M.S Economic appraisal of pest management options in Okra. Pak. J. Zool. 2011, 43: 869-878. Reddy,V.R.; Reddy, P.P and Kumar, U.H Ecological and economic aspects of shrimp farming in Andhra Pradesh, Indian Journal of agriculture Economics. 2004, 20(1): 435. R.S. Singh. Plant Diseases. 2005. Oxford publisher. Sunder, S.; Singh, R.; Dodan, D.S and Mehla, D.S Effect of different nitrogen levels on brown spot (Drechslera oryzae) of rice and its management through host resistance and fungicides. Pl. Dis.Res. 2005, 20: 111-114.