Bleeding canker of horse chestnut is a common canker of horse chestnut trees that is known to be caused by infection with several different pathogens.
Bleeding canker and bark cracking on the trunk of Horse Chestnut
Pseudomonas syringae
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Pseudomonas syringae is a rod-shaped, Gram-negative bacterium with polar flagella. As a plant pathogen, it can infect a wide range of species, and exists as over 50 different pathovars, all of which a
Bleeding canker of horse chestnut
…fission. The pathogen is spreading rapidly across western Europe though movement mostly by wind blown rain. In the past few years, the bacterial pathogen Pseudomonas syringae pv. aesculi has emerged as a new and virulent agent for this disease in Western Europe. Specific to horse chestnut trees, this pathogen infects the bark (cambium…
Pseudomonas syringae cultures
Bacterial speck on tomato in Upstate New York
Tomato plant leaf infected with bacterial speck
P. s. pv. actinidiae infecting a kiwifruit leaf