List of azalea diseases

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

diseases
Anthracnose 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 (Scop.) = Clitocybe tabescens
Cylindrocladium blight and root rot Cylindrocladium scoparium = C. floridanum

Calonectria kyotensis [teleomorph]
Cylindrocladium theae
Calonectria theae [teleomorph]

Damping-off, Pythium Pythium spp.

P. irregulare

Damping-off, Rhizoctonia Rhizoctonia solani

Thanatephorus cucumeris [teleomorph]

Exobasidium leaf spot Exobasidium burtii
Leaf scorch Septoria azalea
Leaf and flower gall Exobasidium vaccinii = E. 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 = P. parasitica
Phytophthora root rot and wilt Phytophthora cinnamomi

P. 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)

[edit] 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

[edit] References