Molecular, Phenotypical, and Host-Range Characterization of Strains Isolated from spp. in Mexico.

Characteristic leaf spot and blight symptoms caused by on bougainvillea plants were found in three locations in different provinces of Mexico from 2019 to 2020. Eleven bacterial isolates with morphology similar to were obtained from the diseased bougainvillea leaves. The isolates were confirmed as by phenotypic tests and 16S rRNA, D, and B gene sequencing. In addition to bougainvillea, the strains were pathogenic to 10 agriculturally significant crops, including maize (), sorghum (), barley (), coffee (), carnation (), Mexican lime (), common bean (), broadbeans (), and pea (), but not runner bean (). The haplotypes network reveals the genetic variability among Mexican strains and its phylogeographic relationship with Japan, the U.S.A., and China. The presence of this pathogen represents a challenge for plant protection strategies in Mexico.