Host Plants - Westcott's Plant Disease - page 631

L EAF S POT . Cercospora symplocarpi,MAto
VA, IN, WI; Septoria spiculosa, MD, NY,
PA, WI.

P OWDERY M ILDEW . Phyllactinia corylea, MI.
R OT , Root. Helicobasidium purpureum, TX.
R UST . Puccinia amphigena (0, I), KS, MI, NE,
ND; II, III on Calamovilfa ; P. arundinariae
(0, I), NC, SC; P. macrospora (0, I), DE, NJ,
NY; II, III on Carex ; P. smilacis (II, III), MA
to FL, TX, and NE; 0, I on Apocynum .

Skunk Vine (Paederia foetide)

L EAF S POT . Pseudocercospora paederiae, FL.

Smithantha

Slenderflower Thistle (Carduus)

V IRUS . Tobacco Mosaic, CA, CT, DC, FL, OH,
WA. R UST . Puccinia carduorum, CA.

Small Flower Galinsoga (Galinsoga
parviflora)

Smithiana

V IRUS . Smithiana Potexvirus.

R OT , Stem. Whetzelinia sclerotiorum, MD.

Smoke-Tree (Cotinus)

Smelowskia

L EAF S POT . Cercospora rhoina, AL; Pezizella
oenotherae, MD; Septoria rhoina, CT, MA,
NY, VA; Gloeosporium sp., IL.
Rot, Root. Phymatotrichum omnivorum, TX.
R UST . Pileolaria cotini-coggyriae, GA, RI.
W ILT . Verticillium albo-atrum, CT, IL, NE, NJ,
NY.

R UST . Puccinia aberrans (0, III), CO, MT, NE,
UT, WA; P. holboellii, NV; P. monoica,CO,
WY.

Smilax (Greenbrier Cat-Brier)

Asparagus.
C ANKER , Felt Fungus. Septobasidium pseudope-
dicellatum, FL.
G ALL . Synchytrium smilacis.
L EAF S POT . Ascochyta confusa, NY, WI;
Cercospora smilacina, CT to FL, TX;
C. smilacis, MA to FL, TX, and MN;
Colletotrichum smilacis, IL;
Cylindrosporium smilacis, AL; Dothiorella
smilacina, MA to LA, TX; Mycosphaerella
smilacicola, GA, SC; Pestalotia clavata,NY
to AL, LA; Phyllosticta subeffusa, IL, KS,
WV; Ramularia subrufa, IA, MS, NE, WI;
Septogloeum subnudum, IL, WI; Septoria
smilacis,WV;Sphaeropsis cruenta, IA;
Stagonospora smilacis, CT to MD, ND, TX.
N EMATODE , Burrowing. Radopholus similis, FL.

For Florists' Smilax,

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Smoke-Tree (Dalea)

L EAF S POT . Cercospora daleae, KS.
M ISTLETOE . Phoradendron californicum,CAto
TX.
R OT , Root. Phymatotrichum omnivorum, TX.
R UST . Pileolaria cotini-coggyriae, AR; Puccinia
andropogonis (0, I), SD to KS; II, III on
Andropogon ; P. paroselae (II, III), CA.

Snakeweed (Polygonum)

N EMATODE , Foliar. Aphelenchoides fragariae,
SC.
R OT , Root. Pythium helicoides, FL.