Vol. 9, Issue 2, Part D (2025)

In the present study, antagonistic activities and disease controlling potential of different isolates of Trichoderma spp. were tested under in-vitro and in-vivo conditions against Sclerotium rolfsii, the causal agent of collar rot of chickpea. Thirty-three isolates of Trichoderma spp. collected from SBCL, Chorbhatti Bilaspur which were isolated from different locations of Chhattisgarh state. Using the dual culture method, all isolates of Trichoderma harzianum and Trichoderma asperellum were found significantly effective against the mycelial growth of S. rolfsii. However, isolates i.e. T₂₇, T₁₇, T₁₆, T₁₂, T₃₁, T₅, T₂₈ and T₂ were found highly effective in arresting the mycelial growth of S. rolfsii.The results of the pot experiments on effect of Trichoderma spp. as seed treatment against collar rot of chickpea indicated that all the treatments were found significantly effective in checking the collar rot mortality and increasing the germination percentage of chickpea over control. However, Trichoderma isolates i.e. T₁ (60.00% & 85.33%), T₆ (60.00% & 80.67%), T₅ (56.36% & 67.33%), T₄ (41.82% & 70.00%), T₃ (27.27% & 81.47%), T₂ (31.82% & 76.67%) T₇ (31.82% & 76.67%), T₂₈ (38.70% & 50.67%), T₁₅ (36.00% & 54.00%) and T₈ (42.73% & 67.13%) were found highly effective in controlling pre-emergence and post emergence collar rot mortality of chickpea respectively.