Biology Reference
In-Depth Information
G. nelsonii (0, I), MT, WA, WY; III on juni-
per; G. nootkatense (0, I), AK, OR, WA; III
on
Chamaecyparis
; G. tremelloides (0, I),
MT to CO, AK, WA.
S
CAB
. Venturia inaequalis, IL, MN, NY, WA.
Mountain-ash is quite susceptible to fire
blight, but affected branches can usually be
pruned out. Rust may appear on foliage in mid-
summer. If the mountain-ash is more desirable
than the junipers nearby, the latter can be eradi-
cated. Fertilizing will help the tree recover from
a bout with Cytospora canker but may increase
susceptibility to fire blight.
Motherwort (Leonurus)
B
LACK
M
ILDEW
. Dimerosporium hispidulum,
TX.
L
EAF
S
POT
. Ascochyta leonuri, LA; Phyllosticta
decidua, OH, TX, WI; Septoria lamii, PA.
V
IRUS
. Mosaic. Unidentified, IN.
Mountain-Ash (Sorbus)
B
ACTERIAL
Crown
Gall.
Agrobacterium
tumefaciens, CT, NJ.
B
ACTERIAL
Fire Blight.
Erwinia amylovora,
Mountain-Heather (Phyllodoce)
widespread, VA.
B
LIGHT
, Leaf. Fabraea maculata, AK, MN, WV,
WI.
B
LIGHT
, Twig. Nectria cinnabarina, corla spot,
AK, NC; Phomopsis
B
LIGHT
, Brown Felt. Herpotrichia nigra, ID.
G
ALL
, Leaf. Exobasidium vaccinii-uliginosi,OR.
sp., MA; Valsa
leucostoma, OH, WV.
C
ANKER
. Cytospora sp., VA.
C
ANKER
, Blister. Nummularia discreta,IA,MA.
C
ANKER
, Branch;
Mountain-Holly (Nemopanthus)
Fruit Rot.
Glomerella
L
EAF
S
POT
. Ramularia nemopanthus,NY.
L
EAF
S
POT
, Tar. Rhytisma ilicis-canadensis,ME
to WV, MI.
P
OWDERY
M
ILDEW
. Microsphaera alni, NY, WI.
R
OT
, Wood. Poria inermis, PA.
cingulata, IN.
C
ANKER
;D
IEBACK
. Cytospora chrysosperma,
MN, MT, NE, NJ, WA C. leucostoma, MT;
C. massariana,ID;C. microspora, MT;
Fusicoccum sp., IL.
C
ANKER
, Trunk; Black Rot. Cytospora
rubescens, IA; Physalospora obtusa, IN,
MI, OH, CT to VA.
L
EAF
S
POT
. Alternaria sp., IA; Graphium sorbi,
NY, WI; Phyllosticta globigera, ID, WA;
P. sorbi, IL, IA, ME, MO, OK, TX; Septoria
sorbi, IA; S. sitchensis, ID.
M
ISTLETOE
, European. Viscum album, CA.
P
OWDERY
M
ILDEW
. Podosphaera oxyacanthae
var. tridactyla,WA.
R
OT
, Heart. Polyporus hirsutus, MI, WA;
P. versicolor, WI.
R
OT
,
Mountain-Laurel (Kalmia)
B
ACTERIAL
L
EAF
S
POT
. Pseudomonas syringae,
OR.
B
LIGHT
,Flower.Ovulinia azaleae,AL,SC,AL.
B
LIGHT
, Leaf. Phomopsis kalmiae, NY to NC.
B
LIGHT
, Necrotic Shoots and Leaves.
Phytophthora irrigate and P. hydropathica,
MD, PA, VA, WV.
C
ANKER
; Felt Fungus. Septobasidium sp.,
AL, TX.
G
ALL
, Leaf. Exobasidium vaccinii, AK;
Synchytrium vaccinii, red spot, NJ.
H
EART
, Rot, Wood Rot. Fomes annosus, NC.
L
EAF
S
POT
. Cercospora kalmiae, CT to AL, TN;
Mycosphaerella
Root.
Armillaria
mellea,
NJ;
Phymatotrichum omnivorum, TX.
R
UST
. Gymnosporangium cornutum (0, I), ME
to NJ, WI, MT to CO, AK, WA; III on juniper;
G. globosum (0, I), OR; III on
Libocedrus
;
colorata
(
Phyllosticta
