Biology Reference
In-Depth Information
macrospora, MS; Ceratocystis sp., Rocky
Mts., MN, PA on aspen; Septoria musiva,
Alberta and British Columbia, Canada on
poplar.
C
ANKER
, Sooty Bark. Cenangium singulare,
Rocky Mts.
L
EAF
B
LISTER
, Yellow. Taphrina aurea, SC;
T. populina, MS, New England to Great
Lakes states; T. johansonii, catkin deformity,
widespread; T. populi-salicis, CA, OR.
L
EAF
B
LOTCH
. Septotinia populiperda, ME, MD,
MA, NY, VT.
L
EAF
B
RONZE
. Apioplagiostoma populi, Mani-
toba, Canada.
L
EAF
S
POT
. Marssonina spp., widespread;
Mycosphaerella (
Septoria
) populicola;
M. populorum (
Septoria musiva
), also twig
canker. Phyllosticta spp.; Cercospora
populina,AL,LA,MO;C. populicola,TX;
Stigmina populi,DE;Marsonina brunnea,
WA and central U.S; Septoria populicola,WA.
L
EAF
S
POT
;
R
OT
, Wound.
Schizophyllum commune,
cosmopolitan.
R
UST
, Leaf. Melampsora bietis-canadensis (II,
III), New England to Great Plains; 0, I on
hemlock; M. albertensis (II, III), CA, MT,
NM; 0, I on Douglas-fir; M. larici-populina
(II, III), WA, Quebec, Canada, Eastern North
America; M. medusae (II, III), through U.S.
except far South; 0, I on larch; M. populnea
(III), CO, RI, Pacific Coast; M. occidentalis
(II, III), MT to CA, IA, WA, WI; 0, I unknown.
S
POT
A
NTHRACNOSE
. Sphaceloma populi, OK.
V
IRUS
. Poplar Decline; Poplar Mosaic.
Cytospora canker is rather common on poplars
lacking in vigor, but the Rio Grande cottonwood
in the West is resistant. Avoid wounding, prune
out twigs that have died back, and promote better
growing conditions. Dothichiza canker may kill
Lombardy poplars. Seriously diseased trees
should be destroyed.
Ink Spot. Ciborinia bifrons
Poppy (Papaver)
(
Sclerotinia
whetzelii
)
in
Northeast;
C. confundens
(
Sclerotinia bifrons
), CO to
WY, OR, WA.
M
ISTLETOE
. Phoradendron serotinum
(flavescens), AZ, NM, TX, P. macrophyllum
M
ISTLETOE
, European. Viscum album, CA, on
Populus Fremontii
(Fremont Cottonwood)
and
P. tremuloides
(Quaking Aspen)
N
EMATODE
, Dagger. Xiphinema americanum,
SD, on cottonwood.
N
EMATODE
, Ring. Criconemoides crotaloides.
N
ONPARASITIC
. Chlorosis. Iron deficiency, WY.
P
OWDERY
M
ILDEW
. Uncinula salicis, widespread;
Golovinomyces cichoracearum, UT.
R
OT
, Heart. Daedalea spp., sometimes on living
trees; Fomes igniarius, widespread; F. pini;
Pholiota adiposa
A
NTHRACNOSE
. Gloeosporium sp. (
Glomerella
cingulata
), NJ.
B
LIGHT
, Bacterial. Xanthomonas papavericola,
CT, ME, MO, NJ, NY, OH, OR, VA.
B
LIGHT
, GrayMold. Botrytis cinerea,AK,MD,WI.
L
EAF
S
POT
; Pod Spot. Cercospora papaveri, AL,
FL, TX; Septoria sp., IA.
N
EMATODE
, Leaf. Aphelenchoides fragariae, NJ.
N
EMATODE
, Root Knot. Meloidogyne sp.
P
OWDERY
M
ILDEW
. Erysiphe polygoni, OR;
Leveillula taurica, CA.
R
OT
, Root, Stem; Damping-Off. Rhizoctonia
solani, ID, IN, KS, ME, NJ, NY.
S
MUT
, Leaf. Entyloma fuscum, IA, ME, TX.
V
IRUS
. Beet Curly Top, TX; Tomato Spotted
Wilt, CA.
W
ILT
. Verticillium albo-atrum, NY.
and
P. destruens, New
England states.
R
OT
, Root. Armillaria mellea, occasional;
Phymatotrichum omnivorum, OK, TX;
Cylindrocladium scoparium, of seedlings,
GA.
R
OT
, Wood. Collybia velutipes, sometimes liv-
ing trees, Rocky Mt. states;
Poppy-Mallow (Callirho
ยจ
)
Fomes
spp.;
B
ROOMRAPE
. Orobanche ramosa, TX.
L
EAF
S
POT
. Cercospora althaeina, IL, KS, NE,
WI; Vermicularia spar-sipila, TX.
Polyporus
spp.;
Lenzites
saepiaria,
widespread.
