This article is a list of diseases of rhododendron (Rhododendron spp.).
Bacterial diseases
Bacterial diseasesCrown gall Agrobacterium tumefaciens
Fungal diseases
Fungal diseasesArmillaria root rot Shoestring root rotArmillaria mellea Rhizomorpha subcorticalis [anamorph]Botryosphaeria dieback Botryosphaeria dothidea Fusicoccum aesculi [anamorph]Botrytis leaf and petal blight Botrytis cinerea Botryotinia fuckeliana [teleomorph]Bud and twig blight Pycnostysanus azaleae Briosia azaleaeCercospora leaf spot Pseudocercospora handelii Cercospora handeliiChrysomyxa leaf rust Chrysomyxa ledi var. rhododendri Chrysomyxa piperiana Chrysomyxa roanensisClitocybe root rot (mushroom root rot) Armillaria tabescens Clitocybe tabescensCoryneum leaf spot Seimatosporium rhododendri Coryneum rhododendriCryptostictis leaf spot Seimatosporium mariae Cryptostictis mariaeCylindrocarpon canker and wilt Cylindrocarpon destructans Cylindrocarpon radicicolaDamping-off, Pythium Pythium spp. Damping-off, Rhizoctonia Rhizoctonia solani Thanatephorus cucumeris [teleomorph]Exobasidium leaf spot Exobasidium burtiiGlomerella canker and dieback Glomerella cingulata Colletotrichum gloeosporioides [anamorph]Gray blight Pestalotia sydowianaLeaf and flower gall Exobasidium vaccinii Exobasidium azaleaeLophodermium leaf spot Lophodermium schweinitziiOvulinia petal blight Ovulinia azaleae Ovulitis azaleae [anamorph]Pestalosphaeria leaf spot Pestalosphaeria concentrica Pestalotiopsis guepini [anamorph]Pestalotia leaf spot Pestalotiopsis sydowiana Pestalotia rhododendriPhymatotrichum root rot (cotton root rot) Phymatotrichopsis omnivora Phymatotrichum omnivorumPhytophthora dieback Phytophthora nicotianae var. parasitica Phytophthora parasitica Phytophthora cactorum Phytophthora cinnamomi Phytophthora citricola Phytophthora citrophthora Phytophthora heveae Phytophthora lateralisPhytophthora root rot Phytophthora cactorum Phytophthora cinnamomi Phytophthora citricolaPowdery mildew Microsphaera vaccinii Microsphaera penicillata var. vacciniiPucciniastrum leaf rust Pucciniastrum vacciniiSeptoria leaf spot Septoria rhododendriSpot anthracnose Sphaceloma sp. Stem canker Cylindrocladium theae Calonectria theae [teleomorph]Witches' broom Exobasidium vaccinii-uliginosi
Nematodes, parasitic
Nematodes, parasiticDagger, American Xiphinema americanumLance Hoplalaimus galeatusSheath Hemicycliophora spp. Spiral Helicotylenchus erythinaeStubby-root Paratrichodorus spp. Stunt Tylenchorhynchus claytoni
Viral diseases Viral diseasesNecrotic ringspot Potato virus X group
References
Common Names of Diseases, The American Phytopathological Society Diseases and pests of rhododendrons Images of diseases and pests of rhododendrons