Host Plants - Westcott's Plant Disease - page 475

L EAF S POT . Dothidella castanopsidis, CA, OR;
Mycosphaerella sp., CA, OR.
P OWDERY M ILDEW . Microsphaera alni, NC.
R OT , Heart; Sapwood; Wood. Fomes igniarius,
OR; Ganoderma oregonenses; Peniophora
sanguinea; Polyporus hirsutus; P. versicolor.
R OT , Root. Armillaria mellea, OR.
W ILT , Oak. Ceratocystis fagacearum.

Mycosphaerella arbutifolia, NY;

Phyllosticta arbutifolia, NJ.
R OT , Brown. Monilinia fructicola, WI.
R OT , Root. Phymatotrichum omnivorum, TX.
R UST . Gymnosporangium clavariiforme (0, I),
MA; III on juniper; G. clavipes (0, I), CT, ME,
MA, TX; G. davisii (0, I), ME, MI, NH, WI;
G. fraternum (0, I), DE, MA, ME, NJ, PA; III
on chamaecyparis.

Chiogenes (Creeping Snowberry)

Chokecherry (Prunus virginiana)

R UST . Chrysomyxa chiogenis (II, III), MI, NH,
NY, WI; 0, I unknown.

B ACTERIAL Leaf Spot. Xanthomonas pruni, IL,
MT, NY, WY.
B ACTERIAL , MLO. Peach X-Disease, NH to VA,
IL, WI.
B LACK K NOT . Dibotryon morbosum, general.
B LIGHT , Fruit and Shoot. Monilinia demissa, ID,
WA; M. padi ( Sclerotinia angustior ), VT to
KS, ND.
C ANKER ;D IEBACK . Cytospora chrysosperma,MT.
C ANKER , TWIG.

Chionodoxa (Glory-of-the-Snow)

N EMATODE , Bulb. Ditylenchus dipsaci.

Chirita

V IRUS . Tobacco Mosaic, CA, CT, DC, FL, OH,
WA.

Eutypa lata (syn. E.

armeniacae), CA.
L EAF B LISTER ; Fruit, Shoot Hypertrophy.
Taphrina confusa, widespread.
L EAF S POT . Cylindrosporium nuttallii, OR;
Gloeosporium prunicola, NY;
Lophodermina prunicola, tar spot, CO;
Mycosphaerella cerasella, KS; Phyllosticta
circumscissa; P. virginiana, leaf blotch, NY
to KS and MT; Septoria pruni, MI.
L EAF S POT ; Shot Hole. Cercospora
circumscissa, New England, IA, WI; ND
to KS, and MT; Cercospora lutescens,
general.
N EMATODE , Root Knot. Meloidogyne sp.
POWDERY M ILDEW . Podosphaera oxyacanthae,
widespread; Phyllactinia corylea,WA.
R OT , Brown Heart. Fomes fulvus, ND, SD.
R UST . Tranzschelia pruni-spinosae (II, III), CT
to IL, WI.
V IRUS . Western X-Disease, ID, OR, UT, WA;
Tatter Leaf (Peach Ring Spot).
Chokecherries

Chives (Allium schoenoprasum)

B LIGHT , Leaf. Botrytis byssoidea, CA.
D OWNY M ILDEW . Peronospora destructor,CA.
R UST . Puccinia porri (II, III), CT, NY, WA.
S MUT . Urocystis cepulae,MA.

Chlorogalum (Soap-Plant)

L EAF S POT . Heterosporium gracile, CA.
R UST . Uromyces aureus (0, I, III), CA.

Chokeberry (Aronia)

B ACTERIAL Fire Blight. Erwinia amylovora, MI,
TX, WV.
D ODDER . Cuscuta compacta, FL.
L EAF S POT . Ascochyta pirina, WI; Cercospora
mali, AL, TX;

should be eliminated

near peach orchards to control the peach

C. piri, MI, NH, WI; X-disease.