Efficacy of Trichoderma harzianum isolates against soil borne plant pathogens

Abstract

In this study, the biocontrol abilities of different isolates of Trichoderma harzianum against soil borne plant pathogens were investigated in vitro. An experiment was conducted at Plant Pathology Section, College of Agriculture, Nagpur during 2023-2024. A seven days sporulated culture of Trichoderma harzianum isolates and Soil borne plant pathogens were collected from Plant Pathology Section, College of Agriculture, Nagpur. In Fusarium oxysporum f. sp. ciceri, the maximum mycelial growth inhibition was observed in CTH (T3) is followed by BTH (T2) i.e. 79.83% and 75.17%. In Fusarium oxysporum f.sp. lini, the maximum mycelial growth inhibition was observed in CTH (T3) is followed by DAG (T4) i.e. 75.66% and 72.41%. In Rhizoctonia bataticola, the maximum mycelial growth inhibition was observed in BTH (T2) i.e. 71.64%. In Sclerotium rolfsii, the mycelial growth inhibition was observed in BTH (T2) is followed by ATH (T1) i.e. 82.05% and 74.11%. These results showed that two isolates of Trichoderma harzianum could be used as effective biocontrol agents against these soil borne plant pathogens in vitro.