Host Plants - Westcott's Plant Disease - page 533

B ACTERIAL Leaf Spot. Pseudomonas syringae,
CA, FL; P. syringae pv. hibisci,FL;
Xanthomonas campestris pv. malvacearum,
FL.
B ACTERIAL Wilt. Xanthomonas solanacearum,FL.
B LIGHT ,

C ANKER ;D ECLINE , Bitternut. Fusarium solani
and Ceratocystis smalleyi, IA, MN, WI.
C ANKER , Bark Patch. Aleurodiscus candidus,
MO, OH, PA; Solenia ochracea,MA.
C ANKER , Felt Fungus. Septobasidium spp.,
Southeast.
C ANKER , Heart Rot. Poria spiculosa, destructive
to pignut, shagbark, PA, and South.
C ANKER , Twig. Rosellinia caryae, MI;
Botryosphaeria berengeriana.
G ALL , Trunk, Branch. Phomopsis sp., eastern
states.
L EAF S POT . Fusarium carpineum, WI;
Hendersonia davisii, WI; Marssonina
juglandis ( Gnomonia leptostyla ), NJ, NC to
IA; Microstroma juglandis, Witches'
Broom; Monochaetia desmazierii,MDto
NC, TN; Mycosphaerella carigena, WI;
Pestalotia sphaerelloides, LA; Phyllosticta
caryae, widespread; Septoria caryae, DE,
MI; S. hicoriae, TX; Cercospora fusca.
M ISTLETOE . Phoradendron serotinum
(flavescens), IN, TX; Viscumalbum, CA.
N EMATODE , Root Knot. Meloidogyne sp.
N ONPARASITIC . Rosette. Zinc deficiency, southern
states.
P OWDERY M ILDEW . Phyllactinia corylea, MI, WI;
Microsphaera alni, cosmopolitan.
R OT , Heart. Favolus alveolaris, NY, VT, VA;
Fomes spp., cosmopolitan.
R OT , Root. Armillaria mellea, cosmopolitan;
Clitocybe parasitica, OK; Phymatotrichum
omnivorum AZ, TX; Helicobasidium
purpureum.
R OT , Wood. Daedalea spp.; Ganoderma
curtisii; Polyporus spp.; Steccherinum
septentrionale; Schizophyllum commune;
Stereum hirsutum; Trametes rigida.
S CAB ; Leaf Spot.

Blossom. Choanephora

infundibulifera, FL.
B LIGHT , Leaf Stem. Phytophthora palmivora,
LA; P. parasitica, FL.
B LIGHT , Thread. Pellicularia koleroga, FL; web,
P. filamentosa, FL.
C ANKER ;D IEBACK . Colletotrichum hibisci, FL, TX.
L EAF S POT . Alternaria tenuis, IN, NJ, PA;
Cercospora hibisci, FL, OK, TX;
C. amalayensis, GA; Phyllosticta hibiscina,
LA; Cristulariella pyramidalis, FL, GA,
MD, MS; C. moricola, LA.
N EMATODE , Leaf. Aphelenchoides fragariae, FL.
N EMATODE , Root Knot. Meloidogyne spp., MS,
TX.
N ONPARASITIC . Strapleaf. Molybdenum defi-
ciency, FL.
P OWDERY M ILDEW . Leveillula taurica, TX.
R OT ,

Root. Clitocybe tabescens, FL;

Phymatotrichum omnivorum, TX.
R OT , Stem. Fusarium sp., FL; Phytophthora
parasitica, TX; P. cactorum, LA;
P. palmivora, LA; Sclerotinia sclerotiorum,
NY.
R UST . Kuehneola malvicola (II, III), Gulf states.
S TUNTING . Hoplolaimus magnistylus, MS.
V IRUS . Mosaic, unidentified, FL; Hibiscus Chlo-
rotic Ringspot; Tomato Spotted Wilt, TX;
Potato Leaf Roll, Pacific Northwest; Hibis-
cus Latent Fort Pierce,NM.

Hickory (Carya)

Cladosporium effusum,

A NTHRACNOSE ; Leaf Spot. Gnomonia caryae,
general (see under

general.
S POT A NTHRACNOSE . Elsino¨ randii.
W ILT . Verticillium sp., VA.
Of the various leaf spots on hickory,
anthracnose caused by Gnomonia caryae is
the most destructive. There are no
recommended control measures for witches'
broom appearing on shagbark hickory except
cutting them out.

Leaf Spots ).

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B ACTERIAL Crown Gall. Agrobacterium

tumefaciens, KS, MD, TX.
B LOTCH , Leaf. Mycosphaerella dendroides,
widespread East and South.
C ANKER . Nectria galligena and Ceratocystis

smalleyi, eastern U.S.; Strumella

coryneoidea, MD, PA.