This article is a list of diseases of rye (Secale cereale).
| Bacterial diseases | |
|---|---|
| Bacterial streak (black chaff) | Xanthomonas campestris pv. translucens |
| Halo blight | Pseudomonas coronafaciens pv. coronafaciens |
| Fungal diseases | |
|---|---|
| Anthracnose | Colletotrichum graminicola Glomerella graminicola [teleomorph] |
| Black head molds | Alternaria spp. Cladosporium herbarum Davidiella tassiana, Mycosphaerella tassiana [teleomorph] Epicoccum spp. Sporobolomyces spp. Stemphylium spp. |
| Black point | Bipolaris sorokiniana [anamorph] Cochliobolus sativus [teleomorph] |
| Bunt (stinking smut) | Tilletia caries T. tritici Tilletia laevis T. foetida |
| Cephalosporium stripe | Hymenula cerealis Cephalosporium gramineum |
| Common root rot and seedling blight | Bipolaris sorokiniana Helminthosporium sativum Cochliobolus sativus [teleomorph] |
| Cottony snow mold (winter crown rot) | Coprinus psychromorbidus |
| Dilophospora leaf spot (twist) | Dilophospora alopecuri |
| Dwarf bunt | Tilletia controversa |
| Ergot | Claviceps purpurea Sphacelia segetum [anamorph] |
| Fusarium root rot | Fusarium culmorum |
| Halo spot | Pseudoseptoria donacis Selenophoma donacis |
| Karnal bunt (partial bunt) | Neovossia indica Tilletia indica |
| Leaf rust (brown rust) | Puccinia recondita Aecidium clematidis [anamorph] |
| Leaf streak | Mycosphaerella recutita Cercosporidium graminis Scolicotrichum graminis |
| Leptosphaeria leaf spot | Phaeosphaeria herpotrichoides Leptosphaeria herpotrichoides |
| Loose smut | Ustilago tritici |
| Pink snow mold (Fusarium patch) | Monographella nivalis var. nivalis Microdochium nivale Fusarium nivale Monographella nivalis [teleomorph] |
| Powdery mildew | Erysiphe graminis |
| Pythium root rot | P. aphanidermatum P. arrhenomanes P. debaryanum P. graminicola P. ultimum |
| Scab | Gibberella zeae Fusarium graminearum [anamorph] |
| Septoria leaf blotch | Septoria secalis |
| Septoria tritici blotch (speckled leaf blotch) | Zymoseptoria tritici Septoria tritici Mycosphaerella graminicola [teleomorph] |
| Sharp eyespot and Rhizoctonia root rot | Rhizoctonia cerealis Ceratobasidium cereale [teleomorph] |
| Snow scald (Sclerotinia snow mold) | Myriosclerotinia borealis Sclerotinia borealis |
| Speckled (or gray) snow mold (Typhula blight) | Typhula idahoensis Typhula incarnata Typhula ishikariensis Typhula ishikariensis var. canadensis |
| Spot blotch | Bipolaris sorokiniana |
| Stagonospora blotch (glume blotch) | Stagonospora nodorum Septoria nodorum Phaeosphaeria nodorum [teleomorph] Leptosphaeria nodorum |
| Stalk smut (stripe smut) | Urocystis occulta |
| Stem rust | Puccinia graminis |
| Storage molds | Alternaria spp. Aspergillus spp. Epicoccum spp. Nigrospora spp. Penicillium spp. Rhizopus spp. |
| Strawbreaker (eyespot or foot rot) | Pseudocercosporella herpotrichoides Tapesia acuformis [teleomorph] |
| Stripe rust (yellow rust) | Puccinia striiformis Uredo glumarum [anamorph] |
| Take-all | Gaeumannomyces graminis |
| Tan spot (yellow leaf spot) | Pyrenophora tritici-repentis Drechslera tritici-repentis [anamorph] Helminthosporium tritici-repentis |
| Nematodes, parasitic | |
|---|---|
| Cereal cyst | Heterodera avenae |
| Leaf and stem | Ditylenchus dipsaci |
| Root gall | Subanguina radicicola |
| Root knot | Meloidogyne spp. |
| Seed gall | Anguina tritici |
| Viral diseases | |
|---|---|
| Barley yellow dwarf | |
| Soilborne mosaic | |
| Wheat streak mosaic | |