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List of azalea diseases

This article is a list of diseases of azalea (Rhododendron spp.).

Fungal diseases

Glomerella cingulata
Colletotrichum gloeosporioides [anamorph]

Armillaria root rot (shoestring root rot)

Armillaria mellea
Rhizomorpha subcorticalis [anamorph]

Botrytis petal blight

Botrytis cinerea
Botryotinia fuckeliana [teleomorph]

Bud and twig blight

Pycnostysanus azaleae
= Briosia azaleae

Cercospora leaf spot

Pseudocercospora handelii
= Cercospora handelii

Clitocybe root rot (mushroom root rot)

Armillaria tabescens
= Clitocybe tabescens

Cylindrocladium blight and root rot

Cylindrocladium scoparium
= Cylindrocladium floridanum
Calonectria kyotensis [teleomorph]
Cylindrocladium theae
Calonectria theae [teleomorph]

Damping-off, Pythium

Pythium spp.
Pythium irregulare

Damping-off, Rhizoctonia

Rhizoctonia solani
Thanatephorus cucumeris [teleomorph]

Exobasidium leaf spot Exobasidium burtii
Leaf scorch Septoria azalea
Leaf and flower gall

Exobasidium vaccinii
= Exobasidium azaleae

Ovulinia petal blight

Ovulinia azaleae
Ovulitis azaleae [anamorph]

Pestalotia leaf spot twig blight, and crown rot

Pestalotiopsis sydowiana
= Pestalotia rhododendri

Phomopsis dieback

Phomopsis spp.

Phyllosticta leaf spot

Phyllosticta spp.

Phytophthora blight and dieback

Phytophthora nicotianae var. parasitica
= Phytophthora parasitica

Phytophthora root rot and wilt

Phytophthora cinnamomi
Phytophthora nicotianae var. parasitica

Powdery mildew

Erysiphe polygoni
Microsphaera penicillata

Pucciniastrum leaf rust

Pucciniastrum vaccinii

Twig blight

Monilinia azaleae

Web blight

Rhizoctonia ramicola
Ceratobasidium ramicola [teleomorph]
Rhizoctonia sp. (binucleate)

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


  • Common Names of Diseases, The American Phytopathological Society
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "List_of_azalea_diseases". A list of authors is available in Wikipedia.
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