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USE OF RHIZOPHORA MUCRONATA IN THE CONTROL OF MELOIDOGYNE JAVANICA ROOT KNOT NEMATODE ON OKRA AND MASH BEAN

MARIUM TARIQ, SHAHNAZ DAWAR, FATIMA SULTANA MEHDI AND M. JAVED ZAKI

Abstract: Aqueous and ethanol extracts of leaves and stem of Rhizophora mucronata plant were tested for their nematicidal activity against Meloidogyne javanica root knot nematode. Results showed that R. mucronata exerted more lethal effect in mortality of juveniles as compared to hatching of juveniles. Of the different plant parts used, stem showed more nematicidal effect as compared to leaves in aqueous extract as well as in ethanol extract except that in mortality leaves showed more nematicidal effect in ethanol extract. Soil amendment @ 0.1, 1 and 5 % w/w was carried out with dried powder of leaves and stem of R. mucronata in the control of root knot nematode on mash bean and okra plants. Germination of seeds, shoot length, root length, shoot weight and root weight significantly increased in both mash bean and okra where leaves and stem powder of R. mucronata plant was used @ 5% w/w. Maximum inhibition in root knots were observed when R. mucronata plant parts powder was used @ 5% w/w followed by 1% w/w. Stem powder were found to be more effective as compared to leaves in the control of root knots.
 

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