Diseases of Hop (Humulus lupulus L.)

Sarah Pethybridge and Walt Mahaffee, primary collators (last update 4/5/07)

BACTERIAL DISEASES

Bacterial blight

Pseudomonas cannabina (ex Sutic & Dowson) Gardan, Shafik, Belouin, Brosch, Grimont & Grimont

Bacterial disease

Corynebacterium sp.

Crown gall

Agrobacterium tumefaciens (Smith & Townsend) Conn

Xanthomonas leaf spot

Xanthomonas campestris pv. cannabis Severin

Alternaria blight

Alternaria humuli Simmons

Alternaria cone disorder

Alternaria alternata (Fr.:Fr.) Keissl. = Alternaria tenuis Nees

Anthracnose

Glomerella cingulata (Stoneman) Spauld. & H. Schrenk

Colletotrichum sp.

Armillaria root rot (shoestring root rot)

Armillaria mellea (Vahl:Fr.) P. Kumm.

Rhizomorpha subcorticalis Pers. ex. Gray [anamorph]

Ascochyta leaf spot

Ascochyta humuli Lasch Kabát & Bubák
    = A. humuliphila Melnik
    = Phloeospora humuli Westend.

Black root rot

Phytophthora citricola Sawada
    = P. cactorum (Lebert & Cohn) J. Schröt. var. applanata F. Chester

Canker

Fusarium sambucinum Fuckel
    Gibberella pulicaris (Fr.:Fr.) Sacc.) [teleomorph]

Fusarium roseum Link:Fr.

Fusarium oxysporum Schltdl.:Fr.

Cercospora leaf spot

Cercospora cantuariensis Salmon & Wormald
    = Mycocentrospora cantuariensis (Salmon & Wormald) Deighton

Cone disorder

Ceriospora dubyi Niessl.

Cone early maturity

Podosphaera macularis (Wallr.:Fr.) U. Braun & S. Takamatsu
    = Sphaerotheca macularis (Wallr.:Fr.) Lind
    = Sphaerotheca humuli (DC.) Burrill

Cone tip blight

Fusarium sambucinum Fuckel
    Gibberella pulicaris (Fr.:Fr.) Sacc. [teleomorph]

Fusarium avenaceum (Fr.:Fr.) Sacc.

Fusarium crookwellense L.W. Burgess et al.

Cylindrosporium leaf spot

Cylindrosporium humuli Ellis & Everh.

Downy mildew

Pseudoperonospora humuli (Miyabe & Takah.) G.W. Wils.
    = Peronoplasmopara humuli Miyabe & Takah.

Gray mold

Botrytis cinerea Pers.:Fr.
    Botryotinia fuckeliana (de Bary) Whetzel [teleomorph]

Mycosphaerella leaf spot and cone disorder

Mycosphaerella erysiphina (Berk & Broome) Kirchn.
    = Sphaeria erysiphina Berk. & Broome
    = Sphaerella erysiphina Berk. & Broome

Phoma wilt

Phoma herbarum Westend.

Phoma herbarum f. humuli

Phoma exigua Desm. var. exigua
    Diaporthe perexigua Sacc. [teleomorph]

Phoma aliena (Fr.) Aa & Boerema

Phyllosticta cone disorder

Phyllosticta bractearum Sacc. & Speg.

Phyllosticta leaf spot

Phyllosticta deckdua Ellis & Kellerm.

Phyllosticta humuli var. major Ellis & Everh.

Phyllosticta humuli Sacc. & Speg.

Phyllosticta lupulina Bubák & Kabát

Powdery mildew

Podosphaera macularis (Wallr.:Fr.) U. Braun & S. Takamatsu
    = Sphaerotheca macularis (Wallr.:Fr.) Lind
    = Sphaerotheca humuli (DC.) Burrill

Red crown rot

Phacidiopycnis sp.

Rosellinia root rot (Dematophora root rot)

Rosellinia necatrix Prill.
    Dematophora necatrix R. Hartig [anamorph]

Sclerotinia wilt

Sclerotinia sclerotiorum (Lib.) de Bary
    = Whetzelinia sclerotiorum (Lib.) Korf. & Dumont

Septoria leaf spot

Septoria humuli Westend.

Septoria lupulina Ellis & Kellerm.

Septoria humulina Bondartsev

Septoria divergens Bubák & Kabát

Synchytrium leaf spot

Synchytrium aureum J. Schröt

Verticillium wilt

Verticillium albo-atrum Reinke & Berthier

Verticillium dahliae Kleb.

Cyst nematode

Heterodera humuli Filipjev

Dagger nematode

Xiphinema diversicaudatum (Micoletzky) Thorne

Root-knot nematode

Meloidogyne incognita Chitwood

Stem and bulb nematode

Ditylenchus destructor Thorne

Ditylenchus sp.

Stunt nematode

Tylenchorhynchus dubius Thorne

American hop latent

American hop latent virus (AHLV)

Apple fruit crinkle viroid

Apple fruit crinkle viroid (AFCVd)

Bare bine

Arabis mosaic virus (ArMV)

Hop chlorotic disease

Arabis mosaic virus (ArMV)

Hop latent

Hop latent virus (HpLV)

Hop latent viroid

Hop latent viroid (HLVd)

Hop mosaic

Hop mosaic virus (HpMV)

Hop stunt viroid

Hop stunt viroid (HSVd)

Humulus japonicus

Humulus japonicus latent virus (HJLV)

Nettlehead

Arabis mosaic virus + satellite nucleic acid (ArMV)

Ringspot

Apple mosaic virus
    = Prunus necrotic ringspot virus (PNRSV)

Spidery hop

Arabis mosaic virus (ArMV)

Split leaf blotch

Arabis mosaic virus (ArMV)

Abiotic wilt

Residues of heptachlor and chlordane

Hop-drop

Macrosporium spp.

Sooty mold

Cladosporium fumago f. humuli-lupuli

Fumago vagans

Cladosporium herbarum

Cladosporum sp. (not pathogenic)

Stunt

Unknown

 

Tobacco necrosis virus (TNV)

Petunia asteroid mosaic virus

    = Tomato bushy stunt virus - petunia strain (PeAMV)

Alfalfa mosaic virus (AlMV)

Strawberry latent ringspotvirus (SLRSV)

Unknown virus (H-246)

Cucumber mosaic virus (CMV)

Tobacco mosaic virus (TMV)