This article is a list of diseases of hydrangeas (Hydrangea macrophylla).

Bacterial diseases

Bacterial diseases
Bacterial blight Pseudomonas solanacearum
Bacterial leaf spot Pseudomonas cichorii

Fungal diseases

Fungal diseases
Bud and flower

Cercospora hydrangeae
Corynespora cassiicola
Phyllosticta hydrangeae
Septoria hydrangeae

Powdery mildew

Erysiphe polygoni

Root rot

Pythium spp.

Rust

Pucciniastrum hydrangeae

Southern blight

Sclerotium rolfsii
Athelia rolfsii [teleomorph]

Viral diseases

Viral diseases
Phyllody Hydrangea ringspot virus
Ringspots Hydrangea ringspot virus
Tobacco ringspot virus Tomato spotted wilt virus

References

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