Fire blight - Erwinia amylovora

Erwinia amylovora is the most aggressive pathogen in fleshy fruit species, especially in pear and apple, as well as in other species of the Rosaceae family. The diseases caused by this bacterium are known as Fire Blight. Many other species can be infected by this bacterium, including cultivated or wild ornamental species.

Pseudomonas syringae

The spots and burns on leaves, stems and fruits caused by bacteria are associated with the genera Pseudomonas and Xanthomonas. Of all the species that make up these genera, Pseudomonas syringae is one of the bacteria with the greatest economic impact on agriculture.

Its importance is due to its wide worldwide distribution and the great diversity of cultivated species that can infect. The isolates of this species are assigned to around 50 described pathovaries, whose only difference is in the specific host they attack since they are morphologically identical.

At the microscopic level, P. syringae morphologically appears as a straight cane or something curved and mobile, with polar flagella that allow it to move. It is a common inhabitant of the floors.

Xanthomonas campestris

Xanthomonas campestris is a gram-negative bacterium that causes a wide variety of phytopathologies. It attacks different hosts, over 20 pathovars have been identified for their distinctive pathogenicity in a wide range of plants, including crops and wild plants.

The diseases generally affect the stems, leaves and fruits causing significant losses when the conditions are suitable for the pathogen.