Biocontrol efficacy of Trichoderma viride against fungal pathogens of cumin, groundnut and castor

摘要

A potential Trichoderma viride strain CZTV-1 was screened against 15 fungal plant pathogens of which nine pathogens Diaporthe sp., Nectria haematococca, Fusarium sp., Aspergillusflavus, Lasidiplodia theobromae, Pseudofusicoccum adan-soniae, Fusarium solani, Aspergillus niger and Fusarium brachygibbosum were isolated from groundnut; three pathogens viz., Alternaria alternata, Fusarium equiseti and Fusarium oxysporum were isolated from cumin; and three pathogens viz., Alternaria tenuissima, Chaetomiumatrobrunnem and Alternaria porri were isolated from castor. In dual culture, T. viride (CZTV-1) significantly reduced the mycelial growth of pathogenic fungi which was the least (29.0%) for Fusarium sp. (CZC-3) and which was the maximum (82.2%) for Aspergillus niger (CZGN-12) which was statistically on par with Fusarium solani CZGN-9 (80.7%). This Trichoderma viride isolate (CZTV-1) can be further exploited for commercial scale up as a biocontrol agent under localized climatic conditions of western Rajasthan.