Host Plants - Westcott's Plant Disease - page 562

C ANKER , Bleeding. Phytophthora cactorum,
CT, MA, NJ, NV, NY, RI, VA; P. citricola,
NV.
C ANKER ;D IEBACK . Colletotrichum acutatum,on
Japanese maple, CT; Coniothyrium
negundinis, IL, OK; Cytospora spp., MI;
Eutypella parasitica, MI, MN, NH, NY,
VT, WI; Hypoxylon morsei, MI, MN; Fusar-
ium spp.; Nectria cinnabarina, cosmopoli-
tan, often secondary; N. coccinea; N.
galligena, widespread trunk canker;
Phomopsis sp., OH; P. acerina, NY;
Physalospora spp., secondary; Sphaeropsis
albescens, IL, IA, KS, NY, ND, SD, WI;
Strumella

M ISTLETOE . Viscum album on Big Leaf Maple
( Acer macrophyllum ) and Silver Maple

( A. saccharinum ), CA.
N EMATODE . Criconemoides sp.;
Hemicycliophora sp.; Pratylenchus sp.
thornei; Tylenchorhynchus sp.; Xiphinema
sp.
N EMATODE , Root Knot. Meloidogyne sp., OR;
M. ovalis, WI.
N ONPARASITIC . Leaf Scorch. Common on street
and lawn trees, associated often with high
temperature after a moist spring.
Decline. Frequently roadside salt injury.
Frost Crack. Gas Injury.
P ARASITIC coryneoidea, MI, PA; L ICHEN . Strigula elegans and

Schizoxylon microsporum, Lake states; S. camplanata, Southern U.S., LA.

P OWDERY M ILDEW . Phyllactinia corylea, CA, IA,
NC, OR, SD, VT; Uncinula circinata,MEto
AL, MI, MO, TX; Microsphaera alni;
Sawadaea bicornis, ID, WA; S. tulasnei,
NY, WI, Montreal, Canada.
R OT , Heart, Sapwood, Wound. Collybia
velutipes, CT, MA; Daedalea spp., northeast-
ern and north central states, southward;
Daldinia concentrica, cosmopolitan; Fomes
applanatus; F. connatus; F. igniarius;
Ganoderma lucidum, fatal to some
street trees, NJ, NY; Hericium erinaceous,
VT to MD, MI, MN; Lenzites spp.;
Pholiota adiposa; Pleurotus spp.; Polyporus
spp.; Poria spp.; Steccherinum
septentrionale, general; Stereum spp.;
Schizophyllum commune, cosmopolitan;
Ustulina vulgaris, northeastern and north
central states; Valsa leucosomoides,on
tapped sugar maples.
R OT , Root.

Stegonsporium acerinum, NJ.
C ANKER , Felt Fungus. Septobasidium spp., AL,
FL, KY, LA, NC, SC, TN, VA.
D AMPING -O FF .

Rhizoctonia solani,

cosmopolitan.
D ODDER . Cuscuta gronovii, on seedlings, NY.
L EAF B LISTER . Taphrina carveri, AL, KY, MI,
MO; T. bartholomaei, UT; T. darkeri, OR;
T. dearnessii, black, GA, MI, MN, NC, NY,
OK, PA, VA; T. sacchari, on sugar maple,
AR, GA, IN, KS, ME, MI, MO, NH, NY,
OH, PA, TN, WV, WI.
L EAF S POT . Actinopelte dryina, IL; Alternaria
sp., secondary; Cercospora negundinis, KS,
NE, WI; C. saccharini, MA; Cercosporella
aceris,WA;Cristulariella depraedens, CT,
NY; C. pyramidalis, FL; Monochaetia
desmazierii, GA, NC, OK, TN; Illosporium
maculicola, WA; Laestadia brunnea, NC,
SC; Leptothyrella acerinum, OK;
Marssonina truncatula, OR; Pezizella
oenotherae, NY, NC, VA; Phyllosticta min-
ima, eyespot, general; P. negundinis,MEto
AL, TX, WI; Piggotia negundinis, leaf
blotch, WI, WY; Stilbella acerina, PA;
Septoria aceris, general; Venturia acerina,
NY, PA, VA, WV, WI.
L EAF S POT , Tar. Rhytisma acerinum, general;
R. punctatum, speckled, general.
M ISTLETOE . Phoradendron serotinum
(flavescens), common from NJ to FL, MO,
TX.

Armillaria mellea, general;

Clitocybe tabescens, GA, MO;

Helicobasidium purpureum, TX;

Phymatotrichum omnivorum, TX.
R OT , Sapstreak. Endoconidiophora virescens;
Ceratocystis coerulescens.
R OT , Seedling, Charcoal. Macrophomina
phaseoli, IL.
V IRUS . Peach Rosette; Tobacco Necrotic Ring
Spot.
W ILT . Verticillium albo-atrum, widespread in
cultivated trees, especially Norway maple.