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 | |
| Armillaria root rot (shoestring root rot) | Armillaria mellea |
| Black root rot | Phytophthora citricola |
| Canker | Fusarium sambucinum |
| Downy mildew | |
| Gray mold | Botrytis cinerea |
| Leaf spots | Septoria humuli |
| Phoma wilt | |
| Powdery mildew | Podosphaera macularis |
| Rosellinia root rot (Dematophora root rot) | Rosellinia necatrix |
| Sclerotinia wilt | |
| Verticillium wilt | |
| 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) | |
| Dagger | |
| Root-knot | Meloidogyne hapla |
| Virus and viroid diseases | |
|---|---|
| American hop latent | American hop latent virus |
| Hop latent | Hop latent virus Hop latent viroid |
| Hop mosaic | Hop mosaic virus |
| Nettlehead | Arabis mosaic virus |
| Ringspot | Prunus necrotic ringspot virus |
| Split leaf blotch | Arabis mosaic virus |