Virulence of Xenorhabdus and Photorhabdus bacteria and their toxins against juvenile’s immobilization of Meloidogyne incognita. | [Pakistan Journal of Phytopathology • 2012]

Author(s):

1. H M Aatif: Department of Plant Pathology, University of Agriculture, Faisalabad, Pakistan

2. N Javed: Department of Plant Pathology, University of Agriculture, Faisalabad, Pakistan

3. S A Khan: Department of Plant Pathology, University of Agriculture, Faisalabad, Pakistan

4. S Ahmed: Department of Entomology, University of Agriculture, Faisalabad, Pakistan

Abstract:

Keeping in view the serious health and environmental apprehensions associated with the use of pesticides, entomopathogenic symbiotic bacteria and toxins have the potential to supersede pesticides for the management of various pests. Lab experiments were conducted to test the toxicity of two bacteria Xenorhabdus and Photorhabdus and their toxins at different concentrations against juvenile’s immobilization of Meloidogyne incognita. Cells and toxins of Xenorhabdus and Photorhabdus spp. proved nematoxic to M. incognita. Higher concentrations of bacterial cells suspensions and toxins were more effective in suppression mobilization of juveniles than the lower concentrations. Percentage juvenile’s immobilization of root-knot nematode (RKN) increased with increase in concentration. At concentration of 4 x 107 cells/ml, Xenorhabdus spp. and Photorhabdus spp. cell suspensions completely immobilize the juveniles of M. incognita at 48 h exposure time. Bacterial cell suspensions and bacterial toxins equally immobilized juveniles and caused more than 90% immobilization of juveniles.

Page(s): 170-174

DOI: DOI not available

Published: Journal: Pakistan Journal of Phytopathology, Volume: 24, Issue: 2, Year: 2012

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