Iris chrysographes · Perennial
Bacterial soft rot: Ensure well-drained soil with rhizomes partially exposed; cut away infected tissue and disinfect tools.
Iris leaf spot: Remove and dispose of all leaf debris at the end of the year to reduce overwintering spores.
Iris rust: Pick off lightly infected leaves to slow spread, but avoid removing too much foliage.
Ink disease: Dispose of affected plants immediately and rest the soil from irises for several years.
Virus infection: Dispose of severely affected plants to prevent transmission to neighbouring healthy irises.