This is a list of diseases of cattleya (Cattleya spp.).
| Bacterial diseases | |
|---|---|
| Erwinia carotovora subsp. carotovora = Pectobacterium carotovorum | |
| Brown spot | Acidovorax avenae subsp. cattleyae = Pseudomonas cattleyae |
| Fungal diseases | |
|---|---|
| Anthracnose | Colletotrichum crassipes Glomerella cingulata Colletotrichum gloeosporioides [anamorph] Gloeosporium cattleyae |
| Basal rot | Sclerotium rolfsii |
| Black rot | Phytophthora cactorum Pythium ultimum |
| Bloom shoot necrosis | Alternaria sp. |
| Dieback | Botryodiplodia oncidii |
| Flyspeck | Schizothyrium perexiguum |
| Gray mold | Botrytis cinerea Botryotinia fuckeliana [teleomorph] |
| Leaf necrosis | Curvularia sp. |
| Leaf rot | Pythium splendens |
| Leaf spot | Alternaria sp. Cercospora angreci Cercospora odontoglossi Chaetodiplodia sp. Coniothyrium sp. Corynespora cassiicola Diplodia laelio-cattleyae Diploida paraphysaria Fulvia fulva Lasiodiplodia theobromae Leptothyrium sp. Phoma oncidii-sphacelati Phyllosticta capitalensis Pseudocercospora sp. Septoria selenophomoides |
| Pseudobulb and root rot | Fusarium oxysporum f. sp. cattleyae |
| Root and stem rot | Rhizoctonia solani |
| Root rot | Phytophthora palmivora |
| Rust | Sphenospora kevorkianii Uredo nigropuncta [anamorph] Uredo behnickiana |
| Viral and viroid diseases | |
|---|---|
| Flower break | genus Tobamovirus, Odontoglossum ringspot virus (ORSV) |
| Mosaic | genus Potexvirus, Cymbidium mosaic virus (CymMV) genus Tobamovirus, Odontoglossum ringspot virus (ORSV) |
| White cell necrosis | genus Potexvirus, Cymbidium mosaic virus (CymMV) |
| Miscellaneous diseases and disorders | |
|---|---|
| Algal spot | Cephaleuros virescens Kunze |
| Blind leads | Suboptimal light levels |
| Chlorotic leaf mottle | Iron deficiency |
| Dry sepal | Ethylene toxicity (> 2 – 50 ppb) |
| Edema | Edema |
| Mesophyll collapse | Low temperature exposure |
| No flowers | Extended low light periods on short-day plants |
| Pimpling | High light conditions |
| Sepal wilt | High soluble nitrogen or high levels of air-pollutants |
| Shriveling | Senescence of pseudobulbs |
| Slime molds | Fuligo spp. |
| Ptychogaster sp. (saprotroph) | |
| Sooty blotch | Gloeodes pomigena |
| Sooty mold | Capnodium spp. |
| Sunburn | Sudden high light |
| Tip necrosis | Calcium deficiency |
| White streaking | Genetic flower break |