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Abstract
Groundnut (Arachis hypogea L.) is one of the most important oilseed crops grown in Maharashtra. Stem rot disease of groundnut is caused by Sclerotiumrolfsiithe most damaging to the groundnut crop in field and causing great losses.Pathogen infected the stem and produced the dark brown lesion Form rhizosphere of groundnut stem rot infected plants Trichodermaviride was isolated. In dual culture studies it was observed that Trichodermaviride inhibited the germination and growth of all the seven isolates of Sclerotiumrolfsii. Among all the seven isolates of Sclerotiumrolfsii, hundred per cent inhibition of Sclerotiumrolfsii were recorded by Trichodermaviride. Means Trichodermaviridewas effective against all the seven isolates of Sclerotiumrolfsii.