Optimization of fermentation conditions and identification of active substances from <scp> <i>Bacillus velezensis</i> HZ33 </scp> for inhibiting <scp> <i>Rhizoctonia solani</i> </scp> in potato black scurf

This study presents the first evidence that marihysin B, the most active constituent of B. velezensis HZ33, has strong biocontrol potential against the potato black scurf pathogen, providing a basis for developing new biocontrol agents and fungicide lead compounds. © 2026 Society of Chemical Industry.