Biology Reference
In-Depth Information
Daphne
Delphinium (Larkspur)
B
LIGHT
,
Twig.
Botrytis
sp., Northeast,
B
ACTERIAL
Black Spot, Leaf Spot. Pseudomonas
syringae pv. delphinii, ME to VA, MN, TX,
rare in Pacific Coast states.
B
ACTERIAL
Collar Rot. Erwinia carotovora, CA,
NY.
B
ACTERIAL
Northwest.
D
IEBACK
; Wilt. Fusarium sp., NJ.
L
EAF
S
POT
; Leaf Drop. Gloeosporium mezerei,
WA; Marssonina daphnes.
R
OT
, Collar, Stem. Phytophthora cactorum,
CA, NY; Rhizoctonia solani, NY.
R
OT
, Stem; Wilt. Sclerotium rolfsii, FL.
Crown
Gall.
Agrobacterium
tumefaciens,WA.
B
ACTERIAL
Foot Rot; Blackleg. Erwinia
carotovora pv. atroseptica, general.
B
ACTERIAL
, MLO. California Aster Yellows
Stunt, “Greens”, Pacific Coast and Rocky Mts.
B
LIGHT
, Gray Mold, Bud Rot. Botrytis cinerea,
CT, MA, MN, MS, NY, WV, WI.
B
LIGHT
, Southern; Crown Rot. Sclerotium rolfsii
(
S. delphinii
), general.
C
ANKER
, Stem. Diaporthe arctii, MD, NY, NC,
OH, PA; Fusarium spp., widespread;
F. oxysporum f. sp. delphinii, wilt, NY;
Volutella sp., MD; Phoma sp., CT, NJ, NY.
D
AMPING
-O
FF
; Root Rot. Pythium spp. and
Rhizoctonia solani, cosmopolitan.
D
OWNEY
M
ILDEW
. Peronospora ficariae, CA.
G
ALL
, Leaf. Synchytrium aureum,IA.
L
EAF
S
POT
. Ascochyta aquilegiae, CT;
Cercospora delphinii, CO, MD; Ovularia
delphinii, WY; Phyllosticta sp., NY;
P. delphinii, CO; Ramularia delphinii, CA,
CO, UT; Septoria delphinella, IL, KS, WI.
N
EMATODE
, Leaf and Stem. Ditylenchus dipsaci,
OR, WA.
N
EMATODE
, Lesion. Pratylenchus pratensis.
N
EMATODE
, Root Knot. Meloidogyne spp., AZ,
NJ, NY, VA, WA.
N
ONPARASITIC
. Chlorosis. Low temperature and
wet soil.
Variegation. Noninfectious, seed transmitted
leaf-color anomalies.
P
OWDERY
M
ILDEW
. Golovinomyces
cichoracearum, MA, MN, NY, WA;
Erysiphe polygoni, general but some varie-
ties resistant; Sphaerotheca macularis, CA.
R
OT
, Collar; Leaf Spot. Diplodina delphinii, CA,
NY.
R
OT
, Crown. Sclerotium delphinii. See
Datura
B
ACTERIAL
Canker, Vascular. Clavibacter
michiganense,WY.On
Datura
sp.,
D.
innoxia, D. metal, D. meteloides, D. mollis,
D. stramonium
.
B
LIGHT
, Southern. Sclerotium rolfsii, FL.
L
EAF
S
POT
; Pod Blight. Alternaria crassa,
FL, WI.
N
EMATODE
, Root Knot. Meloidogyne hapla.
R
OT
, Root. Thielaviopsis basicola, WI.
V
IRUS
. Bromegrass Mosaic, general; Tomato
Spotted Wilt, CA, TX;
Potato Leafroll,
Pacific NW.
Daylily (Hemerocallis)
B
LIGHT
, Gray Mold. Botrytis sp., MD.
B
LIGHT
, Leaf. Kabatiella sp., secondary, MD.
L
EAF
S
POT
. Cercospora hemerocallis, IL;
Heterosporium gracilis, NJ, NY, TX; Leaf
Streak, Gloecephalus hemerocalli, MS, and
Collecephalus hemerocalli, LA, MS, PA.
N
EMATODE
, Root Knot. Meloidogyne incognita.
R
OT
,
Root.
Sclerotium
sp.,
IN;
Phymatotrichum
omnivorum,
TX;
Armillaria gallsia, SC.
R
UST
. Puccinia hemerocallidis, FL, GA, HI,
Costa Rica.
Decumaria
Blight,
▶
L
EAF
S
POT
. Cercospora decumariae, MS.
Southern.
