This article is a list of diseases of mustard (Brassica juncea var. crispifolia and B. nigra).
| Bacterial diseases | |
|---|---|
| Bacterial black rot | Xanthomonas campestris pv. campestris |
| Bacterial soft rot | Erwinia carotovora Pseudomonas marginalis pv. marginalis |
| Xanthomonas leaf spot | Xanthomonas campestris pv. armoraciae |
| Fungal diseases | |
|---|---|
| Alternaria black spot | Alternaria brassicae Alternaria brassicicola Alternaria raphani |
| Anthracnose | Colletotrichum gloeosporioides Glomerella cingulata [teleomorph] Colletotrichum higginsianum |
| Black leg (leaf, root and stem rot) | Leptosphaeria maculans Phoma lingam [anamorph] |
| Black root | Aphanomyces raphani |
| Cercospora leaf spot | Cercospora brassicicola |
| Clubroot | Plasmodiophora brassicae |
| Damping-off | Fusarium spp. Rhizoctonia solani Thanatephorus cucumeris [teleomorph] |
| Downy mildew | Peronospora parasitica |
| Head rot | Rhizoctonia solani |
| Leaf spot | Myrothecium roridum Phyllosticta brassicae Phyllosticta brassicina |
| Powdery mildew | Erysiphe polygoni |
| Sclerotinia stem rot | Sclerotinia sclerotiorum |
| Southern blight | Sclerotium rolfsii Athelia rolfsii [teleomorph] |
| White rust | Albugo candida (Peronospora sp. commonly present in staghead phase) |
| White leaf spot | Pseudocercosporella capsellae |
| Wirestem | Rhizoctonia solani |
| Yellows | Fusarium oxysporum |
| Viral diseases | |
|---|---|
| Mosaic | Cauliflower mosaic virus |
| Rai mosaic virus | |