PJB-2014-201
MANAGEMENT OF ROOT ROT AND ROOT KNOT DISEASE OF MUNGBEAN WITH THE APPLICATION OF MYCORRHIZOSPHERIC FLUORESCENT PSEUDOMONAS UNDER FIELD CONDITION
SYEDA SADIA BOKHARI1, SAMRAH TARIQ1, SYED ABID ALI2, VIQAR SULTANA3, JEHAN ARA4, AND SYED EHTESHAMUL-HAQUE1*
Abstract
The mycorrhizosphere is the region around a mycorrhizal fungus in which nutrients released from the hyphae increases microbial population and its activities. In this study five mycorrhizospheric fluorescent Pseudomonas (MRFP) were evaluated for biocontrol potential under field condition using mungbean (Vigna radiata) as test plant. MRFP-249 significantly reduced Fusarium solani, Rhizoctonia solani and Macrophomina phaseolina. Whereas MRFP246 and MRFP-247 were also found effective against M. phaseolina. Mycorrhizospheric fluorescent Pseudomonas were also found effective against root knot nematode by reducing the galls on roots and nematode’s penetration in roots. Highest fresh shoot weight and plant height was produced by MRFP-248. Plants grown in soil treated with Pseudomonas showed higher number of VAM spores around the mungbean roots than untreated control plants. The mycorrhizal symbiosis should not be considered merely as bipartite, plant-fungus interaction, but should instead include the associated microorganisms, particularly fluorescent Pseudomonas.
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