Abstract

Variations in Physicochemical Parameters and Distribution of Mycoflorain Rhizospheric Soil due to Charcoal Rot of Jowar (Sorghum bicolor L.)

Author(s): M.T. Gavali, Mane S. R., Kumbhar V. R., Birajdar G. M. and U. N. Bhale*

Jowar (Sorghum bicolorL.) plant belongs to family poaceaeis cultivated in warm climates worldwide and  it  is  inhabitant  to  the  tropics  and  subtropics  region.  The  present  investigation  was  studied  physicochemical characterization  and  rhizosphere  soil  mycoflora  in  the  field  of  jowar  charcoal  rot  caused  by Macrophomina phaseolina. Mycoflora of infected field of jowar, need to improve the knowledge of diversity of fungi associated with infected rhizosphere soil. Physico-chemical analyses of infected rhizosphere soil were studied by standard soil testing methods andfungal population dynamicsby using soil dilution technique. Sixteen physicochemical parameters were analyzed. It was foundthat,soil  has alkaline pH but EC, Ca, Na, S and Mo contents were found least,whereas OC, P  and  Kwere high  in  infected  soil  as  compared  to  standard  range.  Due  to  rots  infection,  chemical  contents  of  soilalso changed. Eleven samples of soil were analyzedduring January-March, 2015 and 2016. In all tested soilsamples, 13  genera  and 20  species  of  fungi  were  detected. Aspergillus,  Mucor,  Rhizopus,  Penicillium,  Fusarium   specieswere found  dominant  in  all    tested  study  sites  followed  by Trichoderma,  Monilia,  Pythium,  Phytophthora,  Humicolaetc. Total  number  of  fungal  species  colony  wasfound  dominant  in  Sangola  (S) and  Mohal  (Moh)  sites.Percentage  of frequency and % of contribution was found more in Aspergillus nigerand Fusarium oxysporum.

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