Genetic Diversity of Causing Tobacco Bacterial Wilt in Fujian Province and Identification of Biocontrol sp.

Tobacco bacterial wilt is a highly destructive soilborne disease caused by the species complex, exhibiting a significant risk to global flue-cured tobacco cultivation and resulting in substantial economic loss. In this study, 77 isolates were collected from three prominent flue-cured tobacco cultivation areas in Fujian, China (Nanping, Sanming, and Longyan), in 2021 and 2022. The isolated strains were classified through phylotype-specific multiplex polymerase chain reaction (Pmx-PCR) and physiological tests.