Host Plants - Westcott's Plant Disease - page 572

kalmicola ), CT to AL, IN, MI, TX; Pestalotia
kalmicola, secondary, DE, NJ, PA, TX, WA;
Septoria angustifolia, MA to AL, OH;
Rhytisma andromedae, tar spot, VT.
N ONPARASITIC .

Mulberry (Morus)

B ACTERIAL Hairy Root. Agrobacterium

Chlorosis. Usually iron rhizogenes, NE.

B ACTERIAL Leaf Spot. Pseudomonas syringae
pv. mori, general.
B ACTERIAL Scorch. Xylem limiting bacteria,
Mid-Atlantic and Southern U.S; Xylella
fastidiosa, CA.
B LIGHT , Berry; Popcorn Disease. Ciboria
carunculoides, NC to FL, TX, VA.
B LIGHT ,

deficiency.
P OWDERY M ILDEW . Microsphaera alni var.
vaccinii, WI.
R OT , Root. Armillaria mellea, MD; Corticium
galactinum, ; Phymatotrichum
omnivorum, TX; Phytophthora lateralis,
NC; P. cinnamomi,VA;P. palmivora, VA.
R OT , Wood. Polyporus versicolor, VA; Twig. Myxosporium diedickei,

Stereum rameale, VA.
V IRUS . Rhododendron Necrotic Ringspot, OR.
Phomopsis leaf blight or blotch and
Mycosphaerella (Phyllosticta) leaf spot are com-
mon and rather disfiguring on bushes in shade or
under tree drip. In light cases, removal of spotted
leaves is sufficient.

TX, WA.
C ANKER ; Twig Blight. Cytospora sp., NJ, TX;
Dothiorella sp.; D. mori, NJ, TX; Gibberella
baccata var. mori, widespread; Nectria sp.,
widespread; N. cinnabarina, wide spread;
Sclerotinia sp., TX.
L EAF S POT . Cercospora moricola, PA to FL, NE,
TX; Cercosporella mori, NE, OK, TX;
Exosporium sp., FL; Mycosphaerella
arachnoidea, false mildew, GA, NC;
M. mori, widespread; Phyllosticta moricola,
KS; Cytospora sp., VA.
N EMATODE , Root Knot. Meloidogyne

Mountain-Mahogany (Cercocarpus)

L EAF S POT . Septogloeum cercocarpi, CA.
R OT , Wood. Stereum hirsutum, OR.
S POT A NTHRACNOSE .

spp., NJ,

NC, OK.
P OWDERY M ILDEW . Phyllactinia corylea, OH;
Uncinula geniculata, NY to KS, AL.
R OT , Heart. Polyporus farlowii, AZ, NM;
P. hispidus, CT; Ganoderma applanatum;
Hymenochaete agglutinans, MD.
R OT , Root. Armillaria mellea, DE, NC, OK;
Helicobasidium

Sphaceloma cercocarpi,

CA.

Mountain-Mint (Pycnanthemum)

purpureum, TX;

G ALL , Leaf. Synchytrium cellulare, WI.
L EAF S POT . Cercoseptoria blephiliae, WI;
Cercosporella pycnanthemi, AL.
R UST . Puccinia angustata (0, I), IN; P. menthae
(0, I, II, III), MA to VA, AL, CA, IA, OK, TX.

Phymatotrichum omnivorum, TX.
R OT , Wood. Schizophyllum commune, CA;
Stereum cinerescens, MA.
R UST . Cerotelium fici (II), LA.
Bacterial leaf spot damages nursery trees hav-
ing overhead irrigation; Mycosphaerella leaf spot
sometimes defoliates older trees.

Mountain-Sorrel (Oxyria)

Mullein (Verbascum)

R UST . Puccinia oxyriae (II, III), AK, CA, CO,
ID, OR, UT; O, I unknown.
S MUT , Floral. Ustilago vinosa, AK, CA, CO,
WA, WY.

D OWNY M ILDEW . Peronospora sordida, NJ.
L EAF S POT . Cercospora

verbasicola, TX;

Phyllosticta verbasicola, IN, KS, TX;