Is it a virus???

[JPB]

My Iris foetidissima has yellowish spots on some leaves. Could it be a virus?

[johnw]

My Iris foetidissima has yellowish spots on some leaves. Could it be a virus?

Hans  - Mine is viral and is streaked rather than spotted.  It lives on but is decidedly tired.  It caught it from the variegated form which quickly died.  

johnw - another week of rain ahead.

[Ezeiza]

Hans, looks more like rust. Do you fertilize with high nitrogen or manure?

[JPB]

Alberto, this plant has not been fertilized very much. So excess nitrogen is not likely. If it is a rust, then I should see sporangia after some time. I'll keep an eye on the plant...

[Ezeiza]

Hans, if you gently rub a piece of toilet paper along the leaf and an orange trace is left, you have it.

[JPB]

Alberto, no orange stuff, but if it is a fungus, It may not yet be developping spores. I'll check if it develops later. Thanks for the suggestion