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Effect of leaf Extract of Nilakumil, (gmelina asiatica) against the Root knot Nematode, (Meloidogyne incognita)

Author Affiliations

  • 1Department of Zoology, Ayya Nadar Janaki Ammal College (Autonomous), Sivakasi – 626 124, Affiliated to Madurai Kamaraj University

Res. J. Recent Sci., Volume 3, Issue (ISC-2013), Pages 264-266, (2014)


Studies on the identification and use of local plant extracts for the control of plant parasitic nematodes, or integrated control methods are the current areas of research in plant nematology. The present study was undertaken to identify the new activities from plant origin for their nematicidal activity to determine the egg hatchability and nematode larval mortality of root knot nematode, Meloidogyne incognita. Many plants are known to have nematicidal properties which may be utilized as organic amendments or biopestcides. Many scientists have carried out the research on plant extracts for the control of root knot nematodes .The extract of Gmelina asiatica plant leaves at different concentrations (5, 10, 15, 20 and 25 ppm) were tested on root-knot nematode, Meloidogyne incognita egg masses. The nematicidal activity of G.asiatica leaves, inhibition of egg hatchability and larval mortality were decreased with increase in all the concentrations of leaf extract. Larval mortality was increased gradually with increased period of exposure time and increasing concentrations of leaf extract. They reported a reduction in egg hatchability and an increase in nematode larval mortality. Hence, the present investigations on nematicidal potential of plant species G.asiatica against the root knot nematodes, M.incognita.


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