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Rose Rust

Rose rust, this fungus causes the brown-black fungal spots on the leaves of roses in autumn and winter.

recognize roze rust
Photo: Jerzy Opioła - CC BY-SA 3.0

Rose rust (Phragmidium mucronatum). This fungus causes the brown-black fungal spots on the leaves of roses in autumn and winter. In summer, the fungal spores are orange-brown. If the fungus is seriously infested, the leaves will fall off prematurely and new shoots will die.
The fungus hibernates on the fallen leaves.
Rose rust is related to violet bramble rust (Phragmidium violaceum).

Where to find

Control

Remove and dispose of affected leaves and stems (not on the compost pile).

Prevention

There are resistant roses.
Prevent Rose rust by ensuring good air circulation around the roses.
Remove fallen leaves in the fall and dispose of them (not in the compost pile).

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