Cannabis Ruderalis

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    Hemp leaf being attacked by red spider mites

    This is a list of diseases of hemp (Cannabis sativa).

    Bacterial diseases[edit]

    Bacterial diseases
    Bacterial blight Pseudomonas cannabina
    Crown gall Agrobacterium tumefaciens
    Striatura ulcerosa Pseudomonas amygdali pv. mori
    Xanthomonas leaf spot Xanthomonas campestris pv. cannabis

    Fungal diseases[edit]

    Fungal diseases
    Anthracnose

    Colletotrichum coccodes

    = Colletotrichum atramentarium
    = Colletotrichum dematium
    Black dot disease

    Epicoccum nigrum

    = Epicoccum purpurascens
    Black mildew Schiffnerula cannabis
    Brown blight

    Alternaria alternata

    = Alternaria tenuis
    Brown leaf spot and stem canker

    Ascochyta spp.
    Ascochyta prasadii
    Phoma spp.
    Didymella spp. [teleomorph]
    Phoma exigua
    Phoma glomerata
    Phoma herbarum

    Charcoal rot Macrophomina phaseolina
    Cladosporium stem canker

    Cladosporium cladosporioides
    Cladosporium herbarum
    Mycosphaerella tassiana [teleomorph]

    Curvularia leaf spot

    Curvularia cymbopogonis
    Curvularia lunata
    Cochliobolus lunatus [teleomorph]

    Cylindrosporium blight

    Cylindrosporium spp.
    Cylindrosporium cannabinum

    Damping-off

    Botrytis cinerea
    Botryotinia fuckeliana [teleomorph]
    Fusarium oxysporum
    Fusarium solani
    Nectria haematococca [teleomorph]
    Macrophomina phaseolina
    Pythium aphanidermatum
    Pythium debaryanum
    Pythium ultimum
    Rhizoctonia solani
    Thanatephorus cucumeris [teleomorph]

    = Pellicularia filamentosa
    Downy mildew

    Pseudoperonospora cannabina
    Pseudoperonospora humuli

    Fusarium foot rot and root rot Fusarium solani
    Fusarium stem canker

    Fusarium sulphureum
    Gibberella cyanogena [teleomorph]

    = Gibberella saubinetii
    Fusarium wilt

    Fusarium oxysporum f.sp. cannabis
    Fusarium oxysporum f.sp. vasinfectum

    Gray mold Botrytis cinerea
    Hemp canker Sclerotinia sclerotiorum
    Leptosphaeria blight

    Leptosphaeria cannabina
    Leptosphaeria woroninii
    Leptosphaeria acuta

    Olive leaf spot

    Cercospora cannabis
    Pseudocercospora cannabina

    Ophiobolus stem canker

    Ophiobolus cannabinus
    Ophiobolus anguillides

    Phoma stem canker

    Phoma herbarum
    Phoma exigua

    Phomopsis stem canker

    Phomopsis cannabina
    Phomopsis achilleae
    Diaporthe arctii var. achilleae [teleomorph]

    Phymatotrichum root rot

    Cotton root rot

    		Phymatotrichopsis omnivora
    = Phymatotrichum omnivorum
    Pink rot Trichothecium roseum
    = Cephalothecium roseum
    Powdery mildew
    (of Cannabis)

    Leveillula taurica
    Oidiopsis taurica [anamorph]
    Podosphaera macularis

    = Sphaerotheca humuli
    = Sphaerotheca macularis

    Oidium sp. [anamorph]

    Golovinomyces cichoracearum sensu lato
    Golovinomyces ambrosiae

    Red boot Melanospora cannabis (secondary on hemp canker)
    Rhizoctonia soreshin and root rot Rhizoctonia solani
    Rust

    Aecidium cannabis
    Uredo kriegeriana
    Uromyces inconspicuus

    Southern blight

    Sclerotium root and stem rot

    Sclerotium rolfsii
    Athelia rolfsii [teleomorph]

    Stemphylium leaf and stem spot

    Stemphylium botryosum
    Pleospora tarda [teleomorph]
    Stemphylium cannabinum

    Tar spot Phyllachora cannabis
    Tropical rot

    Lasiodiplodia theobromae

    = Botryodiplodia theobromae
    Twig blight

    Dendrophoma marconii
    Botryosphaeria marconii [teleomorph]

    Verticillium wilt

    Verticillium albo-atrum
    Verticillium dahliae

    White leaf spot Phomopsis ganjae
    Yellow leaf spot

    Septoria cannabis
    Septoria cannabina

    Nematodes, parasitic[edit]

    Nematodes, parasitic
    Cyst

    Heterodera humuli
    Heterodera schachtii

    Needle

    Paralongidorus maximus
    = Longidorus maximus

    Root-knot

    Meloidogyne incognita
    Meloidogyne javanica

    Stem

    Ditylenchus dipsaci

    Viral diseases[edit]

    Viral diseases
    Alfalfa mosaic & Lucerne mosaic genus Alfamovirus, Alfalfa mosaic virus (AMV)
    Arabis mosaic genus Nepovirus, Arabis mosaic virus (ArMV)
    Cucumber mosaic genus Cucumovirus, Cucumber mosaic virus (CMV)
    Hemp mosaic genus ?Tobamovirus
    Hemp streak genus ?, Hemp streak virus

    Phytoplasmal diseases[edit]

    Phytoplasmal diseases
    Witches' broom

    Miscellaneous diseases and disorders[edit]

    Miscellaneous diseases and disorders
    Fasciation Cause undetermined
    Grey fleck Magnesium deficiency
    Tipburn & leaf margin necrosis Potassium deficiency

    References[edit]

    source: https://en.wikipedia.org/wiki/List_of_hemp_diseases

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