Biology Reference
In-Depth Information
L
EAF
S
POT
. Heterosporium sp., OK.
R
OT
, Crown. Rhizoctonia solani, NJ.
W
HITE
B
LISTER
. Albugo candida,MN.
Nectria spp., widespread; N. galligena;
Cytospora sp., AZ.
C
ANKER
; Felt Fungus. Septobasidium curtisii,
NC.
C
ANKER
, Stem. Fusarium solani, KS;
Phytophthora citricola, NC.
C
ANKER
D
ISEASE
. Geosmithia, AZ, CA, CO, ID,
OR, UT, WA.
D
IEBACK
, Twig and Branch. Neofusicoccum
mediterraneum, CA.
L
EAF
S
POT
. Cercospora juglandis, KS, MA;
Phloeospora multimaculans, TX;
Marssonina californica, CA; Ascochyta
juglandis, ring spot; Grovesinia
pyramidalis, IL, IA, MN, OH, WV;
Mycosphaerella juglandis, IL, IN, IA, NC;
Cristulariella pyramidalis, IL. Also on
Bidens frondosa
(beggar-ticks),
Campsis
radicans
(trumpet vine),
Chenopodium
ambrosioides
(Mexican tea),
Commelina
diffusa
(dayflower),
Cuphea petiolota
(blue
waxweed),
Desmodium canescens
(tick clo-
ver),
Eupatorium coelestinum
(mist-flower),
E. rugosum
(white snakeroot),
Ipomoea
hederscea
(morning-glory),
I. lacunosa
(morning-glory),
Lobelia inflata
(Indian
tobacco),
L. siphilitica
(blue cardinal-flower),
Perilla frutescens
(beefsteak plant),
Phytolacca arnericana
(poke),
Platanus
occidentalis
sycamore),
Polygonum
pennsylvanicum
(smart weed),
P. scandens
(false buckwheat),
Rumex crispus
(yellow
dock),
Sida spinosa
(prickly mallow),
Soli-
dago canadensis
(goldenrod),
Vitis palmata
(Catbird grape).
L
EAF
S
POT
; Downy Spot; White Mold.
Microstroma juglandis, i e-s rea ;
M. brachysporum, general; Alternaria
arborescens, A. alternata, A. tenuissima
(leaf spot and brown/gray apical necrosis), AZ.
M
ISTLETOE
. Phoradendron serotinum
(flavescens), IN southward, AZ, CA, NM.
M
OLD
, Nut. Alternaria sp., CA.
N
EMATODE
, Lesion. Pratylenchus musicola, CA;
P. vulnus.
N
EMATODE
, Root Knot. Meloidogyne spp., TX.
N
ONPARASITIC
. Black End, of Nuts. Probably
drought injury, CA, OR.
Wallflower, Western (Erysimum)
C
LUB
R
OOT
. Plasmodiophora brassicae, NJ.
D
OWNY
M
ILDEW
. Peronospora parasitica, CO,
ID, IA.
L
EAF
S
POT
. Cercospora erysimi, WI.
P
OWDERY
M
ILDEW
. Erysiphe polygoni, CA.
R
OT
, Root. Rhizoctonia solani, TX.
R
UST
. Puccinia aristidae (0, I), AZ, CO, ND, NE,
UT; P. consimilis
(I, III), MT; P. holboellii
(0, III), CO.
V
IRUS
. Tomato Spotted Wilt, CA.
W
HITE
R
UST
; White Blister. Albugo candida, ID,
OR, TX.
Walnut (Juglans) (Includes Butternut,
Black, English, and Japanese Walnuts)
A
NTHRACNOSE
; Leaf Spot. Gnomonia leptostyla
(
Marssonina juglandis
), general.
B
ACTERIAL
Blight. Xanthomonas juglandis,NY
to GA, TX, and Pacific Coast, especially on
English (Persian) walnut.
B
ACTERIAL
Canker. Erwinia nigrifluens, CA;
E. rubrifaciens, phloem canker, CA;
Sirococcus clavigignenti-juglandacearum,
NC.
B
ACTERIAL
Crown
Gall.
Agrobacterium
tumefaciens, occasional.
B
LIGHT
, Leaf. Cylindrosporium juglandis,AL
and TN to TX, CA.
B
LIGHT
, Seedling. Sclerotium rolfsii, TX.
C
ANKER
. Sirococcus clavigignenti-
juglandacearum to Ophiognomonia
clavigignenti-juglandacearum,
Ontario,
Canada; Phomopsis oblonga, CT.
C
ANKER
; Branch Wilt. Hendersonula
toruloidea, connected with sunburn.
C
ANKER
;D
IEBACK
. Diplodia juglandis, wide-
spread; Dothiorella gregaria, CA;
Exosporina fawcetti, wilt, CA; Melanconis
juglandis, widespread, especially in East;
