Evaluation of Faba Bean (Vicia faba) Resistance to Rhizoctonia solani Infection in Soil Amended with Nano-Biochar under Controlled Conditions

Nano-biochar is considered an eco-friendly tool used as a soil amendment in suppressing broad range of plant pathogens and promoting plant growth. This study aimed to emphasize the importance of using nano-biochar, with a particular focus on investigating the effectiveness of corncob nano-biochar (CCNB) at a concentration of 0.5% in suppressing plant pathogens, such as Rhizoctonia solani, and promoting the growth of faba bean plants. Applying 0.5% CCNB was found to have a significant inhibitory effect on the growth and pathogenicity of R. solani, as demonstrated by reduced disease severity and increased total phenolic content in faba bean plants that were infected by Iso1. Nano-biochar not only suppresses disease symptoms but also enhances the physiological processes in plants, such as chlorophyll content and nutrient uptake (N, P, and K), leading to improved plant growth and productivity. These findings support the potential role of biochar as a sustainable soil amendment to manage soil-borne pathogens and improve crop performance and productivity.