Study of biocontrol activity of Trichoderma atroviride PTCC5220 against Rhizoctonia solani AG2-2, the causal agent of root rot in sugar beet

Filamentous fungi such as Trichoderma spp. Produce a variety of chitinases that degrade chitin and play an important role in biological control of fungal diseases. In this research Trichoderma atroviride an over producer of chitinase enzyme among 30 Trichoderma spp. isolates used for study of antagonistic effects on phytopathogenic fungus، Rhizoctonia solani (causal agent of root rot disease in sugar beet). Results of dual culture، slide culture، in vitro and in vivo studies demonstrated the ability of T. atroviride inhibitory effect on R. solani mycelial growth.