Madras Agricultural Journal
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EFFECT OF SEED TREATMENT WITH Trichoderma Viride AND MOISTURE LEVELS ON ROOT ROT DISEASE IN GROUNDNUT

Abstract

Trichoderma seed treatment reduced the root rot caused by Macrophomina phaseolina in groundnut at different moisture levels with maximum disease at 40per cent moisture holding capacity. The population of M.phaseolina in the rhizosphere of groundnut plants was highest at the same moisture level. The rhizosphere population of the antagonist Trichoderma viride was favoured at moisture levels of 40 to 60 per cent. Significant reduction in disease was observed with increasing moisture levels. At 100 per cent MHC all the plants survived, without any disease. The root rot incidence increased with increase in plant age. Higher moisture levels were not favourable for the pathogen as well as the antagonist

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