Host Plants - Westcott's Plant Disease - page 646

B LIGHT ; Leader Dieback. Cause unknown, killing
trees in AL, AR, FL, GA, LA, MD, SC, TX.
B LIGHT , Thread. Pellicularia koleroga, LA.
C ANKER ;D IEBACK . Botryosphaeria ribis var.
chromogena, IL, NY, MD to FL, LA;
B. dothidea, MS; Hymenochaete
agglutinans,MD;Nectria sp.; Dothiorella
berengeriana, bleeding necrosis, NJ, NY;
Xylella fastidiosa, Southern CA.
C ANKER , Felt Fungus. Septobasidium alni;
S. apiculatum, S. burtii, S. mariani, S.
pseudopedicellatum,

Sweet Alyssum (Lobularia)

B ACTERIAL , MLO. Aster Yellows, NJ.
C LUB R OOT . Plasmodiophora brassicae, NJ.
D AMPING -O FF , Root Rot. Rhizoctonia solani, NJ,
NY, VA; Pythium ultimum, NJ.
D ODDER . Cuscuta sp., TX.
D OWNY M ILDEW . Peronospora parasitica, CA,
NJ.
N EMATODE , Root Knot. Meloidogyne sp.
P OWDERY M ILDEW . Erysiphe polygoni, CA.
R OT , Crown. Sclerotinia sclerotiorum, VA.
R OT , Root. Phoma lingam, CA.

and S. sinuosum,

southern states.
L EAF S POT . Cercospora liquidambaris,MDto
FL, TX; C. tuberculans, FL, LA, MS, MO;
Discosia artocreas, OK; Exosporium
liquidambaris, TX; Leptothyrella
liquidambaris, red leaf spot, IL, MD, NC;
Septoria liquidambaris, MA to FL, TX;
Actinopelte dryina; Cladosporium sp., OR.
M ISTELTOE .

Sweet-Fern (Comptonia)

R UST , Blister. Cronartium comptoniae (II, III),
ME to MN, NC, OH; 0, I on hard pine.
R UST , Leaf. Gymnosporangium ellisii (0, I), NJ;
II, III on Chamaecyparis .

Phoradendron serotinum

(flavescens), OH to NC, TX.
N EMATODE , Root Knot. Meloidogyne sp.
N ONPARASITIC . Blight; Decline; Leader Dieback.
Killing trees in AL, AR, FL, GA, LA, MD, SC,
TX. Partly moisture shortage.
R OT , Heart. Polyporus adustus and P. gilvus,
widespread.
R OT ,

Sweet-Flag (Acorus)

L EAF S POT . Cylindrosporium acori, CT, KS;
Ramularia aromatica, CT to MD, IN, WI;
Septocylindrium sp., NY.
R UST . Uromyces sparganii (II, III), ME to VA,
IL, MN, MS; 0, I unknown.

Root. Clitocybe tabescens, FL;

Phymatotrichum omnivorum, TX;

Cylindrocladium scoparium, GA.
R OT , Wood. Daedalea confragosa,
cosmopolitan; Fomes spp., Ganoderma
spp.; Hericium erinaceus; Steccherinum
ochraceum; S. pulcherrimum, Gulf states;
Polyporus spp., Poria spp.; Pleurotus spp.;
Schizophyllum commune,

Sweet Gale (Myrica gale)

B LIGHT , Twig. Diplodia sp., NJ.
L EAF S POT . Ramularia monilioides, NY:
Septoria myricata,NY.
R UST . Cronartium comptoniae, ME to NY,
WA; 0, I on pine; Gymnosporangium ellisii
(0, I), ME.

cosmopolitan;

Stereum spp.

Sweetleaf (Symplocos)

G ALL , Bud. Exobasidium symploci, Gulf states
to NC and IN.
L EAF S POT . Septoria stigma, AL; S. symploci,
FL, MS, NC, OK, TX.
R OT , Root. Phymatotrichum omnivorum, TX.

Sweet Gum (Liquidambar)

A NTHRACNOSE . Gloeosporium nervisequum.
B ACTERIAL L EAF S CORCH . Xylella fastidiosa, KY.