Role of inoculum level on diseases incidence of dry root rot caused by Macrophomina phaseolina in groundnut

C.UMAMAHESWARI; G.RAMAKRISHNAN AND P.NALLATHAMBI

doi:https://doi.org/10.29321/MAJ.10.A00420

Madras Agricultural Journal

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Role of inoculum level on diseases incidence of dry root rot caused by Macrophomina phaseolina in groundnut

Author: C.UMAMAHESWARI, G.RAMAKRISHNAN AND P.NALLATHAMBI,

p-ISSN: 0024-9602, e-ISSN:2582-5321, Vol: 87, Issue: jan-mar,

DOI:https://doi.org/10.29321/MAJ.10.A00420

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Abstract

Active role of Macrophomina phaseolina incolum level in dry root rot incidence of groundnut was found. Maximum disease incidence was recorded in unsterilized and sterilized soil at 15-45 days after sowing. Significant increase in disease incidence (48.7 and 98.5 per cent) with increase in inoculum level from 500 to 1000 mg/kg. of unsterilized and sterilized soil was noted. In unsterilized soil, 50 per cent reduction in root incidence due to the activity of bacteria and actinomycetes was observed compared to sterilized soil.

Keywords: Disease incidence. Inoculum level, Macrophomina phaseolina, Sterilized soil, Unsterilized soil

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