Pseudomonas viridiflava

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Pseudomonas viridiflava symptoms on onion plant (click on image to enlarge it)
Author(s): Howard F. Schwartz, Colorado State University
Source: IPM Images

Pseudomonas viridiflava (Burkholder) Dowson

The bacterium causes leaf blights and rots on beans, cauliflower, chinese cabbage, onions (bacterial streak and bulb rot), cucurbits, tomatoes, eggplants and several ornamentals (e.g. pansies). It can also live as saprophyte. The species is closely related to Pseudomonas syringae.

Vernacular names
• English: bulb rot of onions
bacterial streak of onions
• Français: dépérissement bactérien de l'abricotier