This article is a list of diseases of papaya (Carica papaya).
| Bacterial diseases | ||
|---|---|---|
| Bacterial canker | Erwinia sp. | |
| Bacterial leaf spot | Pseudomonas caricapapayae | |
| Bacterial wilt | Pseudomonas solanacearum | |
| Papaya Bunchy Top Disease | Rickettsia | |
| Erwinia decline | Erwinia sp. | |
| Erwinia mushy canker | Erwinia sp. | |
| Internal yellowing | Enterobacter cloacae | |
| Purple stain | Erwinia herbicola | |
| Fungal diseases | |
|---|---|
| Alternaria fruit spot | Alternaria alternata |
| Angular leaf spot | Leveillula taurica |
| Anthracnose | Colletotrichum gloeosporioides |
| Black spot | Asperisporium caricae Cercospora papayae Phomopsis caricae-papayae |
| Blossom spot | Choanephora cucurbitarum |
| Black rot | Mycosphaerella caricae |
| Brown spot | Corynespora cassiicola Cercospora melonis Cercospora vignicola Helminthosporium cassiicola Helminthosporium vignae Helminthosporium vignicola |
| Chocolate spot | Colletotrichum gloeosporioides |
| Collar rot | Cylindrocladium crotalariae Calonectria crotalariae [teleomorph] |
| Damping off | Colletotrichum gloeosporioides Phytophthora palmivora Phytophthora nicotianae Phytophthora parasitica Pythium aphanidermatum Pythium debaryanum Pythium ultimum Pythium sp. Rhizoctonia solani Thanatephorus cucumeris [teleomorph] |
| Dry rot | Phoma caricae-papayae Ascochyta caricae Ascochyta caricae-papayae Mycosphaerella caricae [teleomorph] |
| Foot rot | Pythium aphanidermatum Pythium ultimum |
| Fruit rot | Monilia sp. |
| Fruit spot | Cercospora mamaonis |
| Fusarium fruit rot | Fusarium solani Fusarium spp. |
| Guignardia spot | Guignardia sp. |
| Greasy spot | Corynespora cassiicola Cercospora melonis Cercospora vignicola Helminthosporium cassiicola Helminthosporium vignae Helminthosporium vignicola |
| Internal blight | Cladosporium sp. Fusarium sp. Penicillium sp. |
| Lasiodiplodia fruit rot | Lasiodiplodia theobromae Botryodiplodia theobromae Botryodiplodia gossypii Diplodia theobromae Diplodia gossypina Diplodia natalensis Lasiodiplodia triflorae |
| Leaf spot | Alternaria sp. Asperisporium caricae Cercospora mamaonis Cercospora papayae Choanephora cucurbitarum Curvularia caricae-papayae Gloeosporium sp. Phoma caricae-papayae Mycosphaerella caricae [teleomorph] Phyllosticta sp. |
| Petiole spot | Didymella sp. |
| Phytophthora blight | Phytophthora palmivora Phytophthora nicotianae var. parasitica Phytophthora parasitica |
| Powdery mildew | Erysiphe cichoracearum Erysiphe sp. Oidium caricae Oidium indicum Ovulariopsis papayae Sphaerotheca fuliginea Sphaerotheca humuli |
| Phytophthora fruit rot | Phytophthora capsici Phytophthora nicotianae var. parasitica Phytophthora parasitica Phytophthora palmivora |
| Rhizopus soft rot | Rhizopus stolonifer Rhizopus nigricans |
| Root rot | Phytophthora palmivora Pythium aphanidermatum Pythium ultimum Pythium spp. Rhizoctonia solani Thanatephorus cucumeris [teleomorph] |
| Sclerotium blight | Sclerotium rolfsii Athelia rolfsii [teleomorph] |
| Seedling blight | Colletotrichum gloeosporioides |
| Stem-end rot | Alternaria alterneta Colletotrichum gloeosporioides Fusarium sp. Lasiodiplodia theobromae Botryodiplodia theobromae Botryodiplodia gossypii Diplodia theobromae Diplodia gossypina Diplodia natalensis Lasiodiplodia triflorae Phoma caricae-papayae Ascochyta caricae Ascochyta caricae-papayae Mycosphaerella caricae [teleomorph] Phomopsis sp. Rhizopus stolonifer |
| Stemphylium fruit spot | Stemphylium lycopersici Thyrospora lycopersici Stemphylium floridanum |
| Stem rot | Fusarium solani Nectria haematococca [teleomorph] Fusarium sp. Phytophthora palmivora Pythium aphanidermatum Pythium ultimum |
| Target spot | Phyllosticta caricae-papayae |
| Verticillium wilt | Verticillium dahliae |
| Wet fruit rot | Phomopsis sp. |
| Miscellaneous diseases and disorders | |
|---|---|
| Algal leaf spot | Cephaleuros virescens |
| Bumpy fruit | Boron deficiency |
| Freckles | Physiological |
| Nivum Haamir dieback | Unknown cause |
| Nematodes, parasitic | |
|---|---|
| Reniform nematode | Rotylenchulus reniformis Rotylenchulus parvus |
| Root-knot nematode | Meloidogyne incognita Meloidogyne javanica Meloidogyne arenaria Meloidogyne hapla |
| Phytoplasmal diseases | |
|---|---|
| Dieback | Phytoplasma |
| Yellow crinkle | Phytoplasma |
| Viral and viroid diseases | |
|---|---|
| Apical necrosis | Papaya apical necrosis virus |
| Droopy necrosis | Papaya droopy necrosis virus |
| Feather leaf | Unknown virus |
| Leaf curl | Virus suspected |
| Mosaic | Papaya mosaic virus |
| Papaya ringspot | Papaya ringspot virus |
| Papaya lethal yellowing | Papaya lethal yellowing virus |
| Spotted wilt | Tomato spotted wilt virus |
| Sticky disease ('meleira') | Papaya meleira virus complex |
| Terminal necrosis and wilt | Tobacco ringspot virus |