Biology Reference
In-Depth Information
WI; Phyllosticta pyrolae, DE, MT, WI;
Septoria pyrolae, MI.
R
UST
. Chrysomxya pirolata (II, III), general
from ME to MN and from MT to CA, AK;
0, I on spruce; Pucciniastrum pyrolae
(II, III), general in West.
Puncture Vine (Tribulus)
V
IRUS
. Tomato Spotted Wilt, General.
Pyracantha (Firethorn)
Queen Anne's Lace, False (Ammi
majus)
B
ACTERIAL
Fire Blight. Erwinia amylovora,
widespread.
B
LIGHT
, Leaf. Fabraea maculata, LA.
B
LIGHT
, Silky Thread. Rhizoctonia ramicola,FL.
B
LIGHT
, Twig. Diplodia crataegi, PA.
C
ANKER
, Felt Fungus. Septobasidium cokeri and
S. mariani, on bark scales.
C
ANKER
;D
IEBACK
. Botryosphaeria ribis, LA.
M
ISTLETOE
, European. Viscum album, CA.
R
OT
,
V
IRUS
. Mosaic, Clover Yellow Vein Potyvirus,
FL.
Quince (Cydonia)
Root.
Armillaria mellea,
CA;
A
NTHRACNOSE
,
Northwestern.
Neofabraea
Phymatotrichum omnivorum, TX.
S
CAB
. Fusicladium pyracanthae, widespread on
leaves and fruit.
W
ILT
. Fusarium oxysporum, FL.
Fire blight is the most common disease. It
infects all species, but some are relatively resistant.
Scab, aften disfiguring on berries, can be prevented
by spraying at bud-break and 10 and 20 days later.
malicorticis, OR, WA.
B
ACTERIAL
Crown
Gall.
Agrobacterium
tumefaciens, general.
B
ACTERIAL
Fire Blight. Erwinia amylovora,
general.
B
ACTERIAL
Hairy Root. Agrobacterium
rhizogenes, ME to NC; Pacific Coast.
B
LIGHT
, Dothiorella Twig. Botryosphaeria ribis,
TX.
B
LIGHT
, Leaf; Black Spot. Fabraea maculata,
general.
B
LIGHT
, Thread. Pellicularia koleroga, NC, Gulf
states.
C
ANKER
, Perennial. Neofabraea perennans, OR.
C
ANKER
, Trunk. Nectria galligena, OR; Twig,
Valsa leucostoma.
F
RUIT
S
POT
. Leptothyrella pomi, MO;
Mycosphaerella pomi, New England to OH.
L
EAF
S
POT
. Phyllosticta sp., DE.
N
EMATODE
, Root Knot. Meloidogyne sp., TX.
P
OWDERY
M
ILDEW
.
Pyrethrum (Chrysanthemum
cinerariifolium, C. coccineum)
B
ACTERIAL
Fasciation. Clavibacter fascians,
CT, MD.
B
ACTERIAL
,MLO.Aster Yellows,KS,NJ,NY.
B
LIGHT
, Gray Mold. Botrytis cinerea, PA.
D
AMPING
-O
FF
. Gloeosporium sp., PA; Pythium
sp., root rot, CO.
N
EMATODE
, Root Knot. Meloidogyne sp.
R
OT
, Root. Phymatotrichum omnivorum, TX;
Rhizoctonia solani, NJ.
R
OT
, Stem. Sclerotinia sclerotiorum, VA.
Phyllactinia corylea, VA;
Podosphaera
leucotricha,
CA, WA;
P. oxyacanthae, NY, WV to IN.
R
OT
, Bitter; Canker. Glomerella cingulata, east-
ern and central states southward.
R
OT
, Black; Canker; Leaf Spot. Physalospora
obtusa, eastern states to AL, TX.
R
OT
, Brown. Monilinia fructicola, eastern states,
MS, OR, TX; M. laxa, also blossom and twig
blight, Pacific Coast.
Pyrola (Shinleaf)
B
LIGHT
, Gray Mold. Botrytis cinerea,MD.
L
EAF
S
POT
. Mycosphaerella chimaphilae, MI;
Ovularia pyrolae, WI; Ramularia pyrolae,
