Ro
Ro
Spores of the fungus hibernate on the soil; splashing rain infects the lower leaves, after which further infection occurs.
Weak plants are more susceptible to Ro
Some roses are more susceptible to Ro
Where to find
- Laurel
- Rose
Control
Remove infested leaves. Spraying with horsetail spray.
Prevention
Water around the plant on the ground, do not water the plant itself. This is how you keep the humidity at the plants low.
For susceptible roses, ensure a sunny location so that the foliage does not stay damp for long after a rain shower. After leaf emergence, treat the foliage preventively with horsetail spray.
Pruning waste and prematurely fallen leaves can contain fungal spores; prevent re-contamination and do not put this waste on the compost heap but dispose of it in the organic waste container.
Roses resistant to Ro
