This article is a list of diseases of black walnuts (Juglans nigra).

Bacterial diseases

Bacterial diseases
Bacterial blight Xanthomonas juglandis

Fungal diseases

Fungal diseases
Anthracnose

Gnomonia leptostyla
Marssonina juglandis [anamorph]

Cylindrocladium root rot

Cylindrocladium scoparium
Calonectria kyotensis [teleomorph]
Cylindrocladiella parva
= Cylindrocladium parvum

Fusarium canker

Fusarium sporotrichioides
Fusarium solani
Fusarium lateritium
Fusarium oxysporum

Leaf spot

Mycosphaerella juglandis
Cylindrosporium juglandis [anamorph]

Nectria canker Nectria galligena
Phytophthora root rot

Phytophthora citricola
Phytophthora cinnamomi

Seedling shoot dieback

Phomopsis arnoldiae
= Phomopsis elaeagni

Thousand cankers disease Geosmithia fungus
Walnut bunch Phytoplasma organism
White mold Microstroma juglandis
White trunk rot Phellinus igniarius
Wood decay

Schizophyllum commune
Hypochnicium vellereum
Trametes versicolor
Phellinus gilvus
Peniophora cinerea
Hericium coralloides

Zonate leaf spot Grovesinia pyramidalis

Nematodes, parasitic

Nematodes, parasitic
Lesion nematodes

Pratylenchus musicola

Root-knot nematodes

Meloidogyne spp.

References

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