Author(s):

Devendra Nishad, Shweta Mishra and KP Varma

Abstract: Chickpea is a well-known rainfed crop of high value. Wilt caused by Fusarium oxysporum f.sp. ciceri (FOC) is the major seed, soil borne disease which results in excessive damage to the crop. The present study was aimed to determine the potentiality of locally four isolates bioagents Trichoderma viride against four isolates of Fusarium oxysporum f.sp.ciceri causing chickpea wilt. Under in vitro conditions all the tested antagonist species inhibited the radial growth of the pathogen. The isolates of T. viride showed significance antagonistic effect against F. oxysporum f. sp ciceri. Results showed that Tri-1 strongly inhibit the growth of Foc-4 (72.18%) and its inhibition was least in case of Foc-3 (52.81%). In case of Tri-2 highest inhibition was recorded for Foc-2 (66.87%) and least for Foc-3 (48.43%). Two isolates Tri-3 and Tri-4 showed great inhibition against isolates Foc-4 (63.75 and 6.68% respectively). Tri-3 exhibited least inhibition for pathogen isolate Foc-2 (52.18%) while Tri-4 showed least inhibition against Foc-3 (52.18%) The mean inhibition pattern of all the T. viride isolates showed that Tri-1 and Tri-4 exhibited alike pattern of (62.11 and 62.18% respectively). While isolates Tri-2 and Tri-3 also inhibited the pathogen in similar manner (56.9 and 56.56% respectively). Results of the study show that bio-agent significantly reduced the wilt incidence of chickpea.

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