Host Plants - Westcott's Plant Disease - page 463

V IRUS . Camellia Yellow Mottle Leaf (color-
breaking strains).
Flower blight is a devastating disease that has
spread with plants in cans or pots. Order camel-
lias bare-rooted, with all flower buds showing
color picked off. Dieback is the subject of much
controversy among camellia fans. Drastic surgery
and a copper spray early in the season to prevent
infection through bud scars seems to be helpful.
Chelated iron may mask color-breaking virus
symptoms.

Camphor-Tree (Cinnamomum)

A NTHRACNOSE . Glomerella cingulata, Gulf states.
B LACK M ILDEW . Lembosia camphorae, FL.
C ANKER ; D IEBACK . Diplodia camphorae,

D. natalensis, D. tubericola, widespread;

Gloeosporium camphorae and G.

ochraceum, also leaf spot, Gulf states.
L EAF S POT , Algal. Cephaleuros virescens,FLto
LA.
M ISTLETOE .

Phoradendron serotinum

(flavescens), FL.
N EMATODE , Lesion. Pratylenchus pratensis, FL.
N ONPARASITIC . Chlorosis. Manganese deficiency,
FL.
P OWDERY M ILDEW . Microsphaera alni

Camomile (Anthemis)

B ACTERIAL , MLO. California Aster Yellows,
CA.
D AMPING -O FF . Rhizoctonia solani,WA.
N EMATODE , Root Knot. Meloidogyne

var.

cinnamomi, LA.
R OT , sp., Root. Armillaria mellea, FL;

FL, MD.
R OT , Root. Phymatotrichum omnivorum, TX.

Phymatotrichum omnivorum, TX;

Clitocybe tabescens, FL.
S POT A NTHRACNOSE . Elsinoe¨cinnamomi,MS,SC.
W ILT , Laurel. Raffaelea lauricola, GA, FL.

Campanula (Bellflower, Canterbury)

Candlestick Shrub (Cassia)

B ACTERIAL , MLO. Aster Yellows, PA.
B ACTERIAL , Proliferation. Rhodococcus fascians,
OR.
B LIGHT , Gray Mold. Botrytis cinerea, AK.
B LIGHT , Southern. Sclerotium rolfsii, IL, NJ.
L EAF S POT . Ascochyta bohemica, WI;
Cercoseptoria minuta, WI; Phyllosticta
alliariifoliae, NJ, NY; Ramularia
macrospora, AK; Septoria campanulae, IL,
IA, KS, MO, WI.
N EMATODE , Leaf. Aphelenchoides sp.
N EMATODE , Root Knot. Meloidogyne sp.
P OWDERY

L EAF S POT . Tubakia dryina, LA.

Candytuft (Iberis)

B LIGHT , Gray Mold. Botrytis cinerea, AK.
C LUB R OOT . Plasmodiophora brassicae, MS, NJ.
D ODDER . Cuscuta indecora, TX.
D OWNY M ILDEW . Peronospora parasitica,CA.
N EMATODE , Root Knot. Meloidogyne sp., AL.
P OWDERY M ILDEW . Erysiphe polygoni, CA.
R OT , Root. Phoma lingam, CA; Pythium
oligandrum, ME.
V IRUS . Lettuce Mosaic, NY.
W HITE R UST . Albugo candida, CA.

M ILDEW . Golovinomyces

cichoracearum, PA.
R OT , Root. Fusarium sp., NY, NJ; Rhizoctonia
solani, CT, IL, TX.
R OT , Stem. Sclerotinia sclerotiorum, MD, WA.
R UST . Coleosporium campanulae (II, III), wide-
spread; 0, I on pine; Aecidium campanulastri
(0, I), IA, MN; Puccinia campanulae (III),
CA, MT, NY, OR, WA.
V IRUS . Tomato Spotted Wilt, CA.
W ILT . Verticillium albo-atrum.

Canna

B LIGHT , Southern. Sclerotium rolfsii, TX.
L EAF S POT . Alternaria sp., MI, SC, TX.