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Common Names of Plant Diseases
Diseases of English (Persian) Walnut
(
Juglans regia
L.)
S. M. John Mircetich, primary collator; updated by B. L. Teviotdale (last update 7/24/01)
BACTERIAL DISEASES
Crown gall
Agrobacterium tumefaciens
(Smith & Townsend 1907) Conn 1942
Deep bark canker
Erwinia rubrifaciens
Wilson, Zeitoun, & Fredrickson 1967
Shallow bark canker
Erwinia nigrifluens
Wilson, Starr & Berger 1957
Walnut blight
Xanthomonas campestris
pv
. juglandis
(Pierce 1901) Dye (1978)
FUNGAL DISEASES
Anthracnose
Gnomonia leptostyla
(Fr.) Ces. et de Not.
Marssonina juglandis
(Lib.) Magn. [anamorph]
Armillaria root rot
Armillaria mellea
(Vahl:Fr.) P. Kumm.
Branch wilt
Hendersonula toruloidea
Nattrass
Cotton root rot
Phymatotrichopsis
omnivora
(Duggar) Hennebert
=
Phymatotrichum omnivorum
Duggar
Cylindrocarpon dieback
Nectria radicicola
Gerlach & L. Nilsson
Cylindrocarpon destructans
(Zinssmeister) Scholten
[anamorph]
=
C. radicicola
Wollenw.
Downy leaf spot
Microstroma juglandis
(Berenger) Sacc.
Melanconium dieback
Melanconis chartusiana
Tul.
Melanconium juglandinum
Kunze [anamorph]
Phytophthora crown and root rot
Phytophthora
spp.
P. cactorum
(Lebert & Cohn) J. Schröt.
P. cinnamomi
Rand
P. citricola
Sawada
P. citrophthora
(R.E. Sm. & E.H. Sm.) Leonian
P. cryptogea
Pethybr. & Lafferty
P. drechsleri
Tucker
P. megasperma
Drechs.
P. nicotinae
Breda de Haan var.
parasitica
(Dastur)
G.M. Waterhouse
=
P. parasitica
Dastur
Phytophthora trunk and branch canker
Phytophthora cactorum
(Lebert & Cohn) J. Schröt.
P. citricola
Sawada
P. citrophthora
(R.E. Sm. & E.H. Sm.) Leonian
NEMATODES, PARASITIC
Pin nematode
Paratylenchus
spp.
Ring nematode
Mesocriconema xenoplax
(Raski) Loof & de Grisse
Root lesion nematode
Pratylenchus vulnus
Allen & Jensen
Root knot nematode
Meloidogyne
spp.
VIRAL DISEASES
Blackline
genus
Nepovirus, Cherry leaf roll virus
(CLRV)
Walnut ring spot
genus
Nepovirus, Cherry leaf roll virus
(CLRV)
MISCELLANEOUS DISEASES AND DISORDERS
Alternaria leaf spot
Alternaria alternata
(Fr.:Fr.) Keissl.
Apoplexy
Unknown
Ascochyta ring spot
Ascochyta juglandis
Boltshauser
Mesophyll collapse
High temperature and low humidity
Oilless nuts
Unknown
Pistillate flower abscission
Excess pollen
Stem canker
Fusarium solani
(Mart.) Sacc.