This article is a list of diseases of pigeon peas (Cajanus cajan).
| Bacterial diseases | |
|---|---|
| Bacterial leaf spot and stem canker | Xanthomonas campestris pv. cajani |
| Halo blight | Pseudomonas amygdali pv. phaseolicola |
| Fungal diseases | |
|---|---|
| Alternaria blight | Alternaria alternata Alternaria tenuissima |
| Anthracnose | Colletotrichum cajani Colletotrichum truncatum |
| Armillaria root rot | Armillaria mellea |
| Botryodiplodia blight | Lasiodiplodia theobromae = Botryodiplodia theobromae |
| Botryosphaeria stem canker | Botryosphaeria xanthocephala Fusicoccum cajani [anamorph] |
| Botrytis gray mold | Botrytis cinerea |
| Cercoseptoria leaf spot | Cercoseptoria cajanicola |
| Cercospora leaf spot | Mycovellosiella cajani = Cercospora cajani Cercospora indica Cercospora instabilis Cercospora thirumalacharii |
| Cladosporium leaf blight | Cladosporium oxysporum |
| Cladosporium leaf spot | Cladosporium cladosporioides |
| Collar rot | Sclerotium rolfsii Athelia rolfsii [teleomorph] = Corticium rolfsii |
| Colletotrichum stem canker | Colletotrichum crassipes |
| Damping-off | Pythium aphanidermatum Pythium splendens var. hawaiianum |
| Dieback and stem canker | Colletotrichum capsici |
| Diplodia stem canker | Diplodia cajani |
| Dry root rot | Macrophomina phaseolina = Rhizoctonia bataticola |
| Fusarium leaf blight | Fusarium pallidoroseum = Fusarium semitectum |
| Fusarium seedling rot | Fusarium avenaceum Fusarium equiseti |
| Fusarium wilt | Fusarium udum Gibberella indica [teleomorph] |
| Macrophomina stem canker | Macrophomina phaseolina =Rhizoctonia bataticola |
| Myrothecium leaf spot | Myrothecium gramineum Myrothecium roridum |
| Neocosmospora root rot | Neocosmospora vasinfecta |
| 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 drechsleri |
| Phytophthora Stem Canker | Phytophthora nicotianae var. parasitica = Phytophthora parasitica |
| Powdery mildew | Leveillula taurica Oidiopsis taurica [anamorph] Ovulariopsis ellipsospora |
| Rust | Uredo cajani |
| Sclerotinia stem rot | Sclerotinia sclerotiorum |
| Seedling or seed rot | Aspergillus flavus Aspergillus niger |
| Synchytrium brown gall and wilt | Synchytrium phaseoli-radiati |
| Synchytrium orange gall | Synchytrium umbilicatum |
| Web blight | Thanatephorus cucumeris Rhizoctonia solani [anamorph] |
| Wet leaf rot | Choanephora cucurbitarum |
| Wet root rot | Rhizoctonia solani Thanatephorus cucumeris [teleomorph] |
| Nematodes, parasitic | |
|---|---|
| Dirty root (reniform nematode) | Rotylenchulus reniformis |
| Lance nematode | Aphasmatylenchus Hoplolaimus seinhorsti |
| Pearly root (cyst nematode) | Heterodera cajani |
| Root-knot (root-knot nematode) | Meloidogyne acronea Meloidogyne arenaria Meloidogyne incognita Meloidogyne javanica |
| Viral diseases | |
|---|---|
| Arhar mosaic | |
| Foliar vein yellowing | |
| Mild mosaic | |
| Mosaic | |
| Phyllody | Mycoplasma-like organism |
| Rhynchosia little leaf | Mycoplasma-like organism |
| Rhynchosia Mosaic | Rosette Mycoplasma-like organism Virus (most likely) |
| Sterility mosaic | Pigeonpea Sterility Mosaic Virus |
| Witches' broom | Mycoplasma-like organism |
| Yellow mosaic | Mung bean yellow mosaic virus |