This article is a list of diseases of hops (Humulus lupulus).
| Bacterial diseases | |
|---|---|
| Bacterial disease | Corynebacterium sp. |
| Crown gall | Agrobacterium tumefaciens |
| Fungal diseases | |
|---|---|
| Alternaria cone disorder | Alternaria alternata Alternaria tenuis |
| Armillaria root rot (shoestring root rot) | Armillaria mellea Rhizomorpha subcorticalis [anamorph] |
| Black root rot | Phytophthora citricola Phytophthora cactorum var. applanata |
| Canker | Fusarium sambucinum Gibberella pulicaris [teleomorph] |
| Downy mildew | Pseudoperonospora humuli |
| Gray mold | Botrytis cinerea Botryotinia fuckeliana [teleomorph] |
| Leaf spots | Septoria humuli Ascochyta humuli Mycocentrospora cantuariensis Cercospora cantuariensis |
| Phoma herbarum | |
| Powdery mildew | Sphaerotheca macularis Sphaerotheca humuli |
| Rosellinia root rot (Dematophora root rot) | Rosellinia necatrix Dematophora necatrix [anamorph] |
| Sclerotinia wilt | Sclerotinia sclerotiorum |
| Verticillium wilt | Verticillium albo-atrum Verticillium dahliae |
| Miscellaneous diseases and disorders | |
|---|---|
| Aphid blight (hop aphid) | Phorodon humuli |
| Chlorotic disease | Undetermined |
| Red spider (two-spotted spider mite) | Tetranychus urticae |
| Small hop | Undetermined |
| Sooty mold | Several fungal species including Cladosporium spp. (surface molds only, not pathogens) |
| Weevil, clay colored | Otiorhynchus singularis |
| Nematodes, parasitic | |
|---|---|
| Cyst (eelworm) | Heterodera humuli |
| Dagger | Xiphinema diversicaudatum Xiphinema americanum |
| Root-knot | Meloidogyne hapla Meloidogyne incognita Meloidogyne javanica |
| Virus and viroid diseases | |
|---|---|
| American hop latent | |
| Hop latent | Hop latent virus Hop latent viroid |
| Hop mosaic | Hop mosaic virus Hop stunt viroid |
| Nettlehead | |
| Ringspot | |
| Split leaf blotch | |