First Report of Brown Stripe Disease Caused by Paracidovorax oryzae on Rice (Oryza sativa) in Guangxi (China)

This study reports the first occurrence of brown stripe disease on rice (Oryza sativa) in Guangxi, China, caused by Paracidovorax oryzae. The disease was identified through symptomatic leaf samples, isolation on KB medium, and molecular characterization using 16S rRNA gene sequencing. Pathogenicity was confirmed via seed soaking and spray inoculation, resulting in typical disease symptoms. Genome analysis using Average Nucleotide Identity (ANI) and digital DNA-DNA hybridization (dDDH) supported the identification. The findings highlight the importance of monitoring and managing this pathogen to ensure rice crop health in the region.