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Brenneria Hauben et al. 1999
This genus of bacteria is widely distributed and belongs to the Enterobacteria. It contains around 10 species that are mainly pathogens of woody plants, including forest trees like willow, poplar and oak, or nut trees. They mainly infect the xylem of their host trees, causing trunk cankers, often bleeding ones, that result in wilting and decline diseases. For example, Brenneria nigrifluens is a pathogens of walnut in Europe and western Asia. The species have been previously classified under the genus Erwinia and are Gram-negative rods, 1½-3 µm long.
Type species: Brenneria salicis
Currently, the following species have been entered into the system: