In vitro Evaluation of Trichoderma viride and Trichoderma harzianum against Fusarium oxysporum strains

Fusarium oxysporum is a soil borne fungal pathogen that attacks plants through roots at all stages of plant growth, causes major economic losses by inducing necrosis and wilting symptoms. Trichoderma viride and Trichoderma harzianum were tested against Fusarium oxyspoum strains under in vitro conditions. The results revealed that Trichoderma harzianum showed maximum inhibition 77.77% over Fusarium oxysporum strain (E), whereas in Trichoderma viride showed maximum inhibition 71.00% over Fusarium oxysporum strain (E) in dual culture plate technique. The studies proved that Trichoderma spp. have the potential to control Fusarium oxysporum strains under in vitro to the extent of 77.77% by dual culture plate technique therefore they can be used as effective Biocontrol agents against Fusarium oxysporum phytopathogens.