The influence of moisture levels, inoculum potential and incubation period on the competitive saprophytic ability of Macrophomine phaseolina was studied. Experimental results revealed that in both levels of inoculum i.e.,50 & 100 g/kg of soil the saprophytic survival of Macriphomina phaseolina on groundnut stem bits was maximum at 40 % moisture levels as against 60 and 80% moistures levels. CSA was increasing with increase in incubation period at 40 per cent while it decreased progressively with increase in incubation period at 60 and 80% moisture levels. However variation in the diseases incidence was observed according to level of inoculum added.
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Chidambaram et al. (1999) studied this question.