Rose rust
What is rose rust?
Rose rust is a disease caused by the parasitic fungus Phragmidium tuberculatum and some other closely related species. It is specific to roses, and appears in spring and persists until the leaves fall.
Susceptibility to rust varies widely among rose cultivars, and most modern roses should be resistant to rust.
Rose rust is the least serious of the common rose diseases; black spot and rose powdery mildew are far more prevalent.
© The Royal Horticultural Society 2011 / RHS Registered Charity № 222879/SC038262
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