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Plant Pathology Journal
Year: 2003  |  Volume: 2  |  Issue: 3  |  Page No.: 174 - 180

Suppression of Meloidogyne javanica by Conyza canadensis, Blumea obliqua, Amaranthus viridis and Eclipta prostrata

Zarina Begum, S. Shahid Shaukat and Imran A. Siddiqui    

Abstract: Aqueous shoot extract of four weed species including Conyza canadensis, Blumea obliqua, Amaranthus viridis and Eclipta prostrata inhibited egg hatch and caused mortality of Meloidogyne javanica, the root-knot nematode juveniles in vitro to varying extent with A. viridis being the most effective. The efficacy of the powdered shoot material as soil organic amendment was tested against two nematode inoculum levels (2000 and 4000 J2 pot G 1) in a pot experiment. Soil amendment with the powdered shoot material generally reduced nematode population density, root-knot development and reproductive potential of M. javanica in brinjal roots. A. viridis was most effective in the suppression of root-knot nematode at both the nematode inoculum rates but caused slightly reduction in plant growth presumably owing to its allelopathic activity in soil.

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