| Epilobium | Podosphaera epilobii | Powdery mildew of leaves and stems |
| Puccinia pulverulenta | Rust on leaves, usually not causing major damage to the plant | |
| Pucciniastrum epilobii | Rust on leaves and stems, widespread | |
| Euphorbia | Melampsora euphorbiae | Rust on leaves and stems, affecting a wide variety of species |