Host Plants - Westcott's Plant Disease - page 482

R OT , Root. Phymatotrichum omnivorum, TX;
Pythium mamillatum, CA; Phytophthora
dreschleri, NC.
R OT , Stem. Phoma sp., PA; Sclerotinia
sclerotiorum, DE, OH, PA, TX; Phyllosticta
aquilegicola, WA.
R UST . Puccinia recondita (0, I), CA, CO, ID,
NM, OR, WA; II, III on grasses.
S MUT , Leaf and Stem. Urocystis sorosporioides,
UT.
V IRUS . Cucumber Mosaic, OH; Mosaic,
unidentified, IA, KS.

Collinsia (Blue-Lips, Blue-Eyed Mary)

L EAF S POT . Septoria collinsiae, IL.
R OT , Root. Pythium mamillatum, CA.
R UST . Aecidium insulum (0, I), UT;
Puccinia collinsiae (0, I, II, III), CA, OR,
UT, WA.
S MUT , White. Entyloma collinsiae, CA, OR.

Collinsonia (Horse-Balm)

B LACK S POT , on stem. Phyllachora sp., PA.

Columbo (Frasera)

Collomia

L EAF S POT . Asteroma fraserae, black mildew,
CO, ID; Cercospora fraserae, CO, UT;
Marssonina fraserae, ID, WA; Phyllosticta
fraserae, CO.
R UST . Uromyces speciosus (II, III), CO, NM; 0, I,
unknown.

N EMATODE , Bulb. Ditylenchus dipsaci, Pacific
Northwest.
P OWDERY M ILDEW . Sphaerotheca macularis,
CA, CO, ID, MT, ND, WA, WY.
R UST . Puccinia giliae (II, III), CA, WA; 0,
I unknown; P. plumbaria (0, I, III), NV;
Uromyces acuminatus var. polemonii (0, I),
CO, NE, ND; II, III on marsh grass.

Columnea

V IRUS . Tomato Spotted Wilt, PA.

Coltsfoot (Tussilago)

Commelina (C. diffusa)

L EAF S POT . Mycosphaerella tussilaginis, NY;
Septoria farfaricola, TN.

V IRUS . Aneilema Mosaic, FL; Commelina
Mosaic, FL; Cucumber Mosaic, FL; Trad-
escantia/Zebrinia Mosaic, FL.

Columbine (Aquilegia)

Confederate-Jasmine
(Trachelospermum)

B LIGHT , Gray Mold. Botrytis cinerea;

B. streptothrix.
D AMPING -O FF ; Root Rot. Rhizoctonia solani, IL.
L EAF S POT , Ascochyta aquilegiae, CT, IL,
IA, NJ, NY, PA, TX, WI; Cercospora
aquilegiae, KS, OR; Septoria aquilegiae,
CT, IN, MI, NY, OH, VT, VA, WI;
Haplobasidium pavoninum, AK.
N EMATODE , Root Knot. Meloidogyne sp.
P OWDERY M ILDEW . Erysiphe polygoni,
AK, IL, IN, IA, NJ, NY, OH, PA, TX, UT,
WI, WY.

B LACK M ILDEW ; Sooty Mold. Dimerosporium
pulchrum, LA.
L EAF S POT . Cercospora repens, LA.
R OT , Root. Clitocybe tabescens, FL.

Coral-Bells

Heuchera.

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