Antagonistic Variability among the Isolates of Trichoderma against Fusarium oxysporum f.sp. ciceri

Trichoderma has attained importance as a substitute of chemical pesticides all over the world. Hence, an attempt was intended to corroborate the positive relatedness of antagonistic ability. Among different isolates of Trichoderma isolated from rhizospheric soils has brought attention due to its highly antagonistic activity. The study aimed to determine the potency of native Trichoderma isolates against Fusarium oxysporum f.sp. ciceri under in vitro condition. Maximum per cent inhibition was recorded in isolate T3, followed by T15, T7 and T5 in dual culture. All native rhizospheric isolates of Trichoderma were found significant in reducing mycelial growth of Fusarium oxysporum f.sp. ciceri. The significane of antagonistic potential of twenty Trichoderma isolates was scored on scale (1-5) for degree of antagonism against Fusarium oxysporum f.sp. ciceri. The result revealed that the highest antagonism was found in isolate T3 (T. harzianum) against chickpea wilt.