This article is a list of diseases of azalea (Rhododendron spp.).
Fungal diseases
| Fungal diseases | |
|---|---|
| Anthracnose |
Glomerella cingulata |
| Armillaria root rot (shoestring root rot) |
Armillaria mellea |
| Botrytis petal blight |
Botrytis cinerea |
| Bud and twig blight | |
| Cercospora leaf spot | |
| Clitocybe root rot (mushroom root rot) | |
| Cylindrocladium blight and root rot |
Cylindrocladium scoparium |
| Damping-off, Pythium | |
| Damping-off, Rhizoctonia |
Rhizoctonia solani |
| Exobasidium leaf spot | Exobasidium burtii |
| Leaf scorch | Septoria azaleae |
| Leaf and flower gall | |
| Ovulinia petal blight |
Ovulinia azaleae |
| Pestalotia leaf spot twig blight, and crown rot | |
| Phomopsis dieback |
Phomopsis spp. |
| Phyllosticta leaf spot |
Phyllosticta spp. |
| Phytophthora blight and dieback |
Phytophthora nicotianae var. parasitica |
| Phytophthora root rot and wilt |
Phytophthora cinnamomi |
| Powdery mildew | |
| Pucciniastrum leaf rust | |
| Twig blight | |
| Web blight |
Rhizoctonia ramicola |
Nematodes, parasitic
| Nematodes, parasitic | |
|---|---|
| Dagger, American | Xiphinema americanum |
| Pin | Paratylenchus curvitatus |
| Root-knot | Meloidogyne spp. |
| Sheath | Hemicycliophora spp. |
| Spiral | Rotylenchus buxophilus R. robustus |
| Stubby-root | Paratrichodorus minor |
| Stunt | Tylenchorhynchus claytoni |