Hemp Diseases And Pests

Hemp leaf being attacked by red spider mites

Grab your copy of the most comprehensive manual on the planet, Hemp Diseases and Pests Management and Biological Contro l, written by one of Vermont's own, J.M. McPartland Ph.D. And his colleagues R.C. Clarke, and D.P. Thumb (or scroll) to the back of McPartland.

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

Bacterial diseases[edit]

Bacterial diseases
Bacterial blightPseudomonas cannabina
Crown gallAgrobacterium tumefaciens
Striatura ulcerosaPseudomonas amygdali pv. mori
Xanthomonas leaf spotXanthomonas campestris pv. cannabis

Fungal diseases[edit]

Fungal diseases
Anthracnose

Colletotrichum coccodes
= Colletotrichum atramentarium
= Colletotrichum dematium

Black dot disease

Universal remote control one for all xsight lite. Epicoccum nigrum
= Epicoccum purpurascens

Black mildewSchiffnerula 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 rotMacrophomina phaseolina
Cladosporium stem canker

Cladosporium cladosporioides
Cladosporium herbarum
Mycosphaerella tassiana [teleomorph]

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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 rotFusarium solani
Fusarium stem canker

Fusarium sulphureum
Gibberella cyanogena [teleomorph]
= Gibberella saubinetii

Fusarium wilt

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

Gray moldBotrytis cinerea
Hemp cankerSclerotinia 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 rotTrichothecium roseum

= Cephalothecium roseum

Powdery mildew

Leveillula taurica
Oidiopsis taurica [anamorph]
Sphaerotheca macularis
= Sphaerotheca humuli
Oidium sp. [anamorph]

Red bootMelanospora cannabis (secondary on hemp canker)
Rhizoctonia soreshin and root rotRhizoctonia 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 spotPhyllachora cannabis
Tropical rot

Lasiodiplodia theobromae
= Botryodiplodia theobromae

Twig blight

Dendrophoma marconii
Botryosphaeria marconii [teleomorph]

Verticillium wilt

Verticillium albo-atrum
Verticillium dahliae

White leaf spotPhomopsis 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

Viral diseases[edit]

Viral diseases
Alfalfa mosaic & Lucerne mosaicgenus Alfamovirus, Alfalfa mosaic virus (AMV)
Arabis mosaicgenus Nepovirus, Arabis mosaic virus (ArMV)
Cucumber mosaicgenus Cucumovirus, Cucumber mosaic virus (CMV)
Hemp mosaicgenus Tobamovirus, Sunn-hemp mosaic virus
Hemp streakgenus ?, Hemp streak virus Transmitted by thrips, most likely a Tospovirus

Phytoplasmal diseases[edit]

Phytoplasmal diseases
Witches' broom

Miscellaneous diseases and disorders[edit]

Miscellaneous diseases and disorders
FasciationCause undetermined
Grey fleckMagnesium deficiency
Tipburn & leaf margin necrosisPotassium deficiency

References[edit]

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