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Effect of bioagents on seedling mortality in fodder cowpea Nigam Rashmi Department of Plant Pathology, Janta Vedic College, Baraut, Bagpat, Uttar Pradesh, India. E-mail: neelu.nigam@gmail.com Online published on 30 November, 2019. Abstract Investigations was undertaken to test the bio-control efficiency of Trichoderma and Aspergillus species against the root rot pathogen under pot conditions. Studies showed that all the isolates of Trichoderma species (T. harzianum, T. viride, T. psedokoningii and T. koningii) as well as Aspergillus species (A. flavus and A. niger) significantly inhibited pathogens (M. phaseolina, R. solani and F. oxysporum) and resulted in the reduction of mortality percentage of cowpea seedling. Among the Trichoderma species T. harzianum at all the doses (i.e. 2, 5, 10 and 15 g kg−1 seed) showed minimum mortality of cowpea plants. T. viride found to be next best treatment followed by T. pseudokoningii and T. koningii, Aspergillus species (A. flavus and A. niger) also showed considerable reduction in mortality. However, Aspergillus flavus was least effective when compared with other antagonists. Results also showed that seedling mortality decreased with the increased rate of dose of inoculum. Top Keywords Biocontrol, root rot, mortality. Top | |
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