Host Plants - Westcott's Plant Disease - page 628

N EMATODE . Helicotylenchus sp., FL.
R OT , Root/Stolon. Gaeumannomyces graminis
var. graminis. FL.

R OT , Root. Phymatotrichum omnivorum, TX;
Rhizoctonia solani, IL, NJ.
R OT , Stem. Phytophthora sp., NJ; Sclerotinia
sclerotiorum, LA.
R UST . Coleosporium occidentale (II, III), CA,
CO, ID, MT, OR, WA, WY; 0, I unknown;
C. senecionis (II, III), CO, RI; Puccinia
angustata var. eriophori (0, I), CT, IA, MN,
NH, UT, VT; II, III on Eriophorum and
Scirpus ; P. expansa, CA, UT, WA, WY;
P. lagenophorae, CA; P. recedens, CO, CT
to NC, IA, TN, ND to OR, WA, WY;
P. dioicae (0, I), NE, NM, TX; II, III on
Carex ; P. stipae (0, I), CO, NE, WY; II, III
on Stipa ; P. subcircinata (0, I, III), ID, NE,
NV, NM, ND, UT, WA; Baeodromus
californicus (III), CA.
S MUT , White. Entyloma compositarum, KS,
MD, NE, PA, TX, WI.
V IRUS . Tomato Spotted Wilt.
W HITE R UST . Albugo tragopogonis, CA, CO, IN,
MO, MT, NE, UT, WA.
W ILT . Fusarium sp., NJ; Verticillium albo-
atrum,WA.

Sedum (Stonecrop)

B LIGHT , Southern. Sclerotium rolfsii, KS,
NJ, VA.
L EAF S POT . Septoria sedi, IL, IA, ME, NY;
Pleospora sp., NY; Stemphyliumbolickii,FL.
N EMATODE , Root Knot. Meloidogyne sp.
P OWDERY M ILDEW . Erysiphe sedi, NY.
R OT , Stem. Colletotrichum sp. ( Vermicularia
benficiens ), NY, VA; Phytophthora sp., NY;
Rhizoctonia solani, IL, NJ.
R UST . Puccinia rydbergii (III), UT; P. umbilici
(III), CO, WY.
V IRUS . Tomato Spotted Wilt, PA.
V IRUS , Foliar Ringspot. Tobacco Rattle Virus,
MN.
W ILT . Fusarium oxysporum f. sp. sedi, CA.

Sempervivum (Houseleek)

Sequoia (Redwood and Giant Sequoia) R OT , Leaf and Stem. Phytophthora parasitica,

NY.
R OT , Root. Pythium sp., IA.
R UST . Endophyllum sempervivi (III), MA, NJ,
NY.

B LIGHT , Needle. Chloroscypha chloromela;
Cercospora sequoiae, MD, PA;
Mycosphaerella sequoiae; Pestalotia
funerea, TX; Phytophthora citrophthora,
also branch dieback, CA.
B LIGHT , Seedling. Botrytis douglasii, CA, OH,
PA.
B LIGHT , Twig. Phomopsis juniperovora; Botry-
tis cinerea.
B URLS , Gall, on trunk. Cause unknown.
C ANKER . Botryosphaeria dothidea, VA. [Red-
wood, Dawn] [U.S. Nat'l Arboretum, Wash-
ington, DC]; B. dothidea (

Senecio (Groundsel)

B ACTERIAL , MLO. California Aster Yellows.
G ALL , Leaf. Synchytrium aureum, WI.
L EAF S POT . Cercospora senecionicola, WI;
C. senecionis, TX; Gloeosporium
senecionis, CA; Phyllosticta garrettii, OR,
UT, WY; Ramularia filaris, CO, MT;
R. pruinosa, CO, WY; R. senecionis, CA,
CO; Septoria

¼ B. ribis), CA;
Phytophthora ramorum (branch and leaf
discolor), CA.
C ANKER , Bark. Dermatea livida.
N EMATODE . Meloidogyne hapla, M. incognita,
M. javanica, Pratylenchus penetrans,
P. vulnus, Xiphinema bakeri, CA.
R OT , Charcoal. Macrophomina phaseoli.

cacaliae, AL, IN, TX;

S. senecionis, CA.
N EMATODE , Leaf. Aphelenchoides ritzemabosi.
P OWDERY M ILDEW . Golovinomyces
cichoracearum, ID, MN, NE, VA, WA;
Sphaerotheca macularis, CO, MT, UT, WY.