Ecofriendly Approaches of Potential Microbial Bioagents in Management of Sheath Rot Disease in Rice Caused by Sarocladium oryzae (Sawada)

摘要

There is growing interest in the use of effective microbial bioformulations that might be useful in the development of ecologically sustainable biocontrol strategies for the management of several plant pathogens. Recent studies suggest that the combination of several bio control agents could be more effective in controlling plant pathogens than individual strains. The new microbial consortia of Plant Growth Promoting Rhizobacteria Pseudomonas fluorescens strains Pf1, TDK1, TV5 and Bacillus subtilis isolate TH10 was developed and tested for their bioefficacy against the sheath rot ( Sarocladium oryzae (Sawada) diseases in rice. The microbial consortia (Pf1+TDK1+TV-5+TH 10) effectively reduced sheath rot disease incidence in rice compared to individual bioformulations and control treatments under glasshouse and field conditions. Further, the significant increase in growth parameters and yield were observed in rice plants treated with microbial consortia (Pf1+TDK1+TV5+TH10) compared to individual bioformulations and untreated control. The present study revealed the probable influence of antagonism and plant growth promotion by the mixture of microbial consortia in enhancing the disease resistance in rice plants against sheath rot disease. Plant Growth Promoting Rhizobacteria (PGPR) metabolism which might be useful for development of ecologically sustainable biocontrol strategy for the management of plant pathogens in sustainable manner.