Variation in antagonistic effects of Trichoderma species on Fusarium oxysporum f. sp. ciceri

Fusarium wilt caused by Fusarium oxysporum is the most devastating soil-borne disease of chickpea where the yield loss reaches from 10 to 90% at distinguished geographical locations. Hence, a study was taken up in vitro to evaluate the variation in inhibition percent of locally isolated Trichoderma viride and T. harzianum against thirty-five isolates of Fusarium oxysporum f. sp. ciceri procured from different locations of Prayagraj and adjacent districts. It was found that there was a huge deviation in the inhibiting effects. Trichoderma viride inhibition ranged from 31.25 to 44.12 % where best inhibited isolate was FOC-34 (44.12%) followed moderately inhibited FOC-28 (29.76%) and poorly inhibited FOC-33 (3.13%). On the other, inhibition due to Trichoderma harzianum ranged from 3.39 to 47.26 % where best inhibited isolate was FOC-13 (47.26 %) followed moderately inhibited FOC-2 (29.66) and poorly inhibited FOC-27 (3.90 %). Hence, it reveals that locally isolated Trichoderma sp. had huge variation in their inhibition impacts on Fusarium oxysporum f. sp. ciceri.