Pseudomonas syringiae?

Pseudomonas syringiae?

Observation - Pseudomonas syringiae? - UK and Ireland. Description: White foliage on Creeping Thistle. A bit of internet research indicates that this is caused by the b

White foliage on Creeping Thistle. A bit of internet research indicates that this is caused by the bacterium Pseudomonas syringiae. However, I'm not sure if this is the only possible cause.