Host Plants - Westcott's Plant Disease - page 487

This species is sometimes grown as an orna-
mental. Crotalaria as a cover crop has more
diseases, but C. spectabilis is immune to root-
knot nematode and so particularly useful between
susceptible crops.

Crassula

A NTHRACNOSE . Gloeosporium sp., NJ.
L EAF S POT . Phomopsis sp., CT.
N EMATODE , Leaf. Aphelenchoides sp.
R OT , Root. Armillaria mellea, CA; Pythium sp.,
NJ, NY.

Croton (Codiaeum)

A NTHRACNOSE . Gloeosporium spp., FL, NJ.
R OT , Root. Phymatotrichum omnivorum, TX.
This is the croton of florists.

Creeping Zinnia (Sanvitalia
procumbens)

V IRUS . Sunflower Mosaic, TX.

Croton (Croton)

Creosote Bush (Larrea)

D ODDER . Cuscuta indecora, TX.
G ALL , Leaf. Kutilakesa pironii, FL.
L EAF S POT . Cercospora capitati, TX;
C. crotonicola, SC, TX; C. crotonis, AL,
FL, SC; C. crotonophila, WI; C. maritima,
MS; C. crotonifolia, SC.
N EMATODE , Lesion. Pratylenchus sp., FL.
R OT , Root. Phymatotrichum omnivorum,TX.
R UST . Bubakia crotonis (II, III), KY to AL, AZ,
CA, FL, NE, TX.

B LIGHT . Omphalia sp.
M ISTLETOE . Phoradendron californicum,TXto
CA.

Crinum

L EAF S CORCH ; Red Blotch. Stagonospora

curtisii, CA, NY.
L EAF S POT . Cercospora pancratii, AL, FL, MS.
V IRUS . Mosaic. Unidentified. Crowberry (Empetrum)

R UST . Chrysomyxa empetri (II, III), ME,

Crocus

NH, NY.

B ACTERIAL Scab. Pseudomonas marginata,
occasional on imported stocks.
R OT . Corm. Fusarium oxysporum, NY, PA;
Stromatinia gladioli, dry rot, widespread;
Penicillium sp., blue mold.
V IRUS . Iris Mosaic, CA, MD.

Crown Vetch (Coronilla varia)

N EMATODE . Meloidogyne sp., VA.
R OT , Stem. Sclerotinia trifoliorum; Fusarium
roseum.

Crotalaria (C. retusa) Cryptantha

B LIGHT , Seedling. Alternaria cassiae, MS.
P OWDERY M ILDEW . Oidium erysiphoides var.
crotalariae, LA, MS.
V IRUS . Potato Virus X,on C. juncea .
W ILT ; Root Rot. Fusarium sp., GA, TX.

G ALL , Leaf. Synchytrium myosotidis, AZ, CA.
P OWDERY

M ILDEW . Golovinomyces

cichoracearum, CA, NV.
R UST . Puccinia aristidae (0, I); II, III on native
grasses; P. cryptanthes, CA, WA.