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Pseudomonas ssp

Pseudomonas is a genus of bacteria among which are species that can cause plant and animal diseases.

recognize pseudomonas on tomatoes
Pseudomonas on tomatoes, photo: Chris Smart - Public Domain

Pseudomonas is a genus of bacteria among which are species that can cause plant and animal diseases, such as Pseudomonas syringae (bacterial cancer).
Infection occurs when conditions are poor for the plant and favorable for the bacteria: high humidity with temperatures between 15°C and 25°C.
Pseudomonas tolaasii is responsible for causing blight (brown spots) on edible mushroom species.

Where to find

Control

Remove infested plants.

Prevention

Some leek varieties are more sensitive than others. Practice crop rotation thoroughly.