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Pak. J. Bot., 42(1): 391-400, 2010.

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EFFECT SIDA PAKISTANICA S. ABEDIN AND SENNA HOLOSERICEA FRESEN ON GROWTH AND ROOT ROT DISEASES OF OKRA AND MASH BEAN

ANTHONIA EMMANUAL, SHAHNAZ DAWAR AND M. JAVED ZAKI

Abstract: Leaves and stem extract and powder of Sida pakistanica S. Abedin and Senna holosericea Fresen were used as seed treatment, soil drenching and soil amendment for the control of root rot diseases of okra and mash bean. Results showed that plant growth parameter enhanced and reduced the infection of Fusarium spp., Rhizoctonia solani, Macrophomina phaseolina on mash bean and okra. Seed treatment with leaves and stem extract of S. pakistanica and S. holosericea used @ 25, 50 and 100 % w/v showed control of root rot fungi on mash bean and okra, and significantly increased the plant growth parameter in terms of shoot weight and root weight. Soil drenching with S. holosericea leaf and stem extracts were more effective in the control of Fusarium spp., R. solani and M. phaseolina on mash bean and okra plant followed by the soil and seed treatment with S. pakistanica leaf and stem extracts. Fusarium spp., was controlled by stem extract of S. holosericea @ 50 and 100% w/v. Soil amendment with leaves and stem powder of S. pakistanica and S. holosericea used @ 0.1 and 1% w/w showed reduction in infection of R. solani and M. phaseolina on okra and mash bean and significantly enhanced plant weight of mash bean. S. pakistanica stem powder and S. holosericea leaf powder @ 0.1% w/w were more effective on growth of okra and mash bean whereas S. pakistanica leaf powder @ 0.1 and 1% w/w were more effective in the control of root rot fungi on mash bean and okra.

Department of Botany, University of Karachi, Karachi-75270, Pakistan.