Host genus | Fungal species | Symptoms and notes |
Rhynchospora | Ustanciosporium gigantosporum | Ovary smut, causing dwarfing of infected shoots |
Ribes | Puccinia ribesii-pendulae | Rust of stems and petioles; dubiously present in Britain due to morphologically similar species also reported from this host |
Rosa | Elsinoë rosarum | Anthracnose spots on leaves and stems |
Phragmidium rosae-pimpinellifoliae | Rust of stems and leaves, principally on Rosa pimpinellifoliae | |
Phragmidium tuberculatum | Rust of leaves, on R. canina, R. rubiginosa, R. rugosa etc. | |
Rubus | Elsinoë veneta | Anthracnose lesions of stems, causing death of the cane if uncontrolled. Primarily associated with R. idaeus and hybrids. |
Kuehneola uredinis | Rust of leaves, petioles and stems | |
Phragmidium bulbosum | Leaf rust of Rubus fruticosus agg., also reported on R. caesius. | |
Phragmidium rubi-idaei | Leaf rust of Rubus idaeus | |
Phragmidium violaceum | Rust of leaves of Rubus fruticosus agg. | |
Rumex | Puccinia phragmitis | Rust on leaves. Uredinia and telia on Phragmites |
Ramularia pratensis | Causes leaf spot | |
Ruscus | Phaeosphaeriopsis glaucopunctata | Associated with death of cladodes and dieback of shoots |