Biology Reference
In-Depth Information
L
EAF
S
POT
. Ascochyta rhei, eastern and central
states to MS, KS; Alternaria sp., CA, MN,
NE, NJ, PA; Cercospora sp., DE, MD, NE;
C. rhapontici,IL;Cladosporium sp., CA,
WA; Macrophoma straminella,gen r ;
Ramularia rhei,CA;Septoria rhapontici,IA.
N
EMATODE
, Root Knot. Meloidogyne spp., CA,
MD, NY, OK.
N
ONPARASITIC
. Crack Stem. Boron Deficiency,WA.
R
OT
, Gray Mold. Botrytis cinerea, serious in
greenhouses.
R
OT
, Root. Armillaria mellea, CA, TX;
Phymatotrichum omnivorum, AZ, TX;
Phytophthora cactorum, crown rot, CA,
MO, OK, PA; P. parasitica, IL, KS, LA,
MD, MO, NY, TX, VA; Rhizoctonia solani,
CA, CT, IL, MN, MO, NY, OK, TX, WA.
R
UST
. Puccinia phragmitis (0, I), CA, MN, NE;
II, III on
Phragmites
.
V
IRUS
. Rhubarb Chlorotic Ring; Turnip
Mosaic, AK; Beet Curly Top.
Macrophoma leaf spot is common but seldom
calls for control measures beyond removal of old
stalks in late fall. Plants with crown rot should be
dug and burned.
L
EAF
Streak, White. Mycovellosiella oryzae,TX.
S
MUT
, False. Ustilaginoidea virens, LA.
Rice-Paper Plant (Tetrapanax)
N
EMATODE
, Root Knot. Meloidogyne sp., FL.
Rock-Jasmine (Androsace)
D
OWNY
M
ILDEW
. Peronospora candida, KS.
L
EAF
S
POT
. Mycosphaerella primulae,NM.
R
UST
. Puccinia volkartiana (III), AK.
Rock-Rose (Cistus)
R
OT
, Root. Armillaria mellea.
Rohdea
V
IRUS
. Tomato Spotted Wilt, PA.
Rollinia
Ribbon-Bush (Homalocladium)
D
IEBACK
, Fruit Rot. Glomerella cingulata, FL.
P
OWDERY
M
ILDEW
. Erysiphe polygoni, NY, PA,
WI.
Romanzoffia
Ribbon-Grass (Phalaris)
R
UST
. Puccinia romanzoffiae (III), OR.
E
RGOT
. Claviceps purpurea, NY.
L
EAF
B
LOTCH
(SPOT). Stagonospora foliicola,PA.
L
EAF
S
POT
. Helminthosporium catenarium,PA
on Reed Canary grass (
P. arundinacea
)
L
EAF
S
POT
, Zonate Eye-Spot.
Helminthosporium giganteum,MD.
Rose (Rosa)
B
ACTERIAL
Blast. Pseudomonas syringae.
B
ACTERIAL
Crown
Gall.
Agrobacterium
tumefaciens, general.
B
ACTERIAL
Hairy Root. Agrobacterium
rhizogenes, MD, PA, TX, VA, New England.
B
LACKSPOT
. Diplocarpon
Rice (Oryzae sativa) Cereal Grass
rosae,
general;
Marssonina rosae,MS.
B
LIGHT
, Blossom. Botrytis cinerea, cosmopoli-
tan;
B
LIGHT
, Panicle.
Burkholderia glumae
and
B. gladioli, Southern U.S., Panama.
L
EAF
, Blast. Pyricularia grisea, AR.
gray mold
on
canes
in
storage;
Dothiorella sp., LA, VA.
