This article is a list of diseases of pigeon peas (Cajanus cajan).
Bacterial diseases
| Bacterial diseases | |
|---|---|
| Bacterial leaf spot and stem canker | Xanthomonas campestris pv. cajani | 
| Halo blight | Pseudomonas amygdali pv. phaseolicola | 
Fungal diseases
| Fungal diseases | |
|---|---|
| Alternaria blight | |
| Anthracnose | |
| Armillaria root rot | |
| Botryodiplodia blight | |
| Botryosphaeria stem canker | 
 Botryosphaeria xanthocephala  | 
| Botrytis gray mold | |
| Cercoseptoria leaf spot | 
 Cercoseptoria cajanicola  | 
| Cercospora leaf spot | 
 Mycovellosiella cajani  | 
| Cladosporium leaf blight | |
| Cladosporium leaf spot | |
| Collar rot | 
 Sclerotium rolfsii  | 
| Colletotrichum stem canker | |
| Damping-off | 
 Pythium aphanidermatum  | 
| Dieback and stem canker | |
| Diplodia stem canker | 
 Diplodia cajani  | 
| Dry root rot | |
| Fusarium leaf blight | |
| Fusarium seedling rot | |
| Fusarium wilt | 
 Fusarium udum  | 
| Macrophomina stem canker | |
| Myrothecium leaf spot | 
 Myrothecium gramineum  | 
| Neocosmospora root rot | |
| Periconia leaf spot | 
 Periconia byssoides  | 
| Phaeoisariopsis leaf spot | 
 Phaeoisariopsis griseola  | 
| Phoma stem canker | 
 Phoma cajani  | 
| Phyllosticta leaf spot | 
 Phyllosticta cajani  | 
| Phytophthora blight | 
 Phytophthora drechsleri f.sp. cajani  | 
| Phytophthora root rot and stem blight | |
| Phytophthora Stem Canker | 
 Phytophthora nicotianae var. parasitica  | 
| Powdery mildew | 
 Leveillula taurica  | 
| Rust | 
 Uredo cajani  | 
| Sclerotinia stem rot | |
| Seedling or seed rot | |
| Synchytrium brown gall and wilt | 
 Synchytrium phaseoli-radiati  | 
| Synchytrium orange gall | 
 Synchytrium umbilicatum  | 
| Web blight | 
 Thanatephorus cucumeris  | 
| Wet leaf rot | |
| Wet root rot | 
 Rhizoctonia solani  | 
Nematodes, parasitic
| Nematodes, parasitic | |
|---|---|
| Dirty root (reniform nematode) | Rotylenchulus reniformis | 
| Lance nematode | 
 Aphasmatylenchus  | 
| Pearly root (cyst nematode) | |
| Root-knot (root-knot nematode) | 
 Meloidogyne acronea  | 
Viral diseases
| Viral diseases | |
|---|---|
| Arhar mosaic | Arhar mosaic virus | 
| Foliar vein yellowing | Rhabdovirus | 
| Mild mosaic | Tobacco mosaic virus | 
| Mosaic | Alfalfa mosaic virus | 
| Phyllody | Mycoplasma-like organism | 
| Rhynchosia little leaf | Mycoplasma-like organism | 
| Rhynchosia Mosaic | Rosette  Mycoplasma-like organism   | 
| Sterility mosaic | Pigeonpea Sterility Mosaic Virus | 
| Witches' broom | Mycoplasma-like organism | 
| Yellow mosaic | Mung bean yellow mosaic virus | 
Miscellaneous diseases and disorders
| Miscellaneous diseases and disorders | |
|---|---|
| Marginal leaf burn | Salinity injury (most likely) |