Biology Reference
In-Depth Information
be controlled with repeated application of
GreenCure, sulfur, or Karathane, where the time
and expense are justified. In wet seasons bacterial
and Phytophthora blights may be important, but
dieback is more often due to borers than to diseases.
R
OT
, Root. Pythium spp.; Rhizoctonia solani,
wide spread.
R
OT
, Stem, Foot. Phytophthora cactorum, MD,
MN, NJ, NC, NY, OH, WA, WI; P.
parasitica, top rot, IN, MD, NJ, NY; Rhizoc-
tonia
tuliparum, WA;
Sclerotinia
sclerotiorum, CT, FL, TX, WA.
R
UST
. Puccinia sporoboli (0, I), NE, ND; II, III on
Sporobolus
; Uromyces holwayi (0, I, II, III),
ME to NJ, CA, ID, MI, MN, NE, OR, WA.
V
IRUS
. Lily Fleck; Lily Latent Mosaic; Lily
Mottle; Lily X, CA; Lily Ring Spot; Lily
Rosette; Lily Symptomless, MD, Argentina;
Cucumber Mosaic; Tulip Breaking Mosaic;
Streak, on Easter lily, virus from wild cucum-
ber; Curl-Stripe Disease, OR.
Garden lilies are particularly subject to
Botrytis blight and mosaic. Madonna lilies are
most susceptible, with leaves often completely
blackened in wet weather. Copper sprays are
perhaps most effective. The only sure way to be
free from mosaic and other virus diseases is to
grow lilies from seed in an isolated portion of the
garden.
Lily (Lilium)
B
ACTERIAL
Soft Rot. Erwinia carotovora, GA,
MA, NJ, WV.
B
LIGHT
, Botrytis; Leaf Spot. Botrytis elliptica,
general; B. cinerea, general; B. liliorum, CA;
Botryotinia sphaerosperma, CA.
B
LIGHT
, Bud. Sporotrichum sp., secondary, VA.
B
LIGHT
, Southern; Bulb Rot. Sclerotium rolfsii,
cosmopolitan.
C
ANKER
, Stem. Rhizoctonia solani, CA.
D
AMPING
-O
FF
. Pythium debaryanum; Rhizocto-
nia solani, cosmopolitan.
L
EAF
S
POT
. Cercospora sp., FL; Cercosporella
lilii, CT, NY; Ramularia
sp., WA;
Heterosporium sp., MD.
M
OLD
, Leaf and Bulb. Cladosporium sp.,
cosmopolitan.
N
EMATODE
, Leaf; Bunchy Top; Dieback.
Aphelenchoides fragariae, CA, OR, WA
and in greenhouses.
N
EMATODE
, Lesion. Pratylenchus pratensis, P.
penetrans, Northwest; P. vulnus, OR.
N
EMATODE
, Root Knot. Meloidogyne spp., FL.
N
ONPARASITIC
, Scorch, of Easter lilies. Acid soil,
low fertility, excessive phosphorus.
Bud Blast. Insufficient light; also causes drop of
lower leaves. Chlorosis. Iron deficiency.
Sometimes result of systemic insecticide.
Limber Neck. Physiological.
P
HYTOPLASMA
. Mexico.
R
OT
, Basal. Fusarium oxysporum f. sp. lilii,
general.
R
OT
, Black Scale. Colletotrichum lilii, LA, MS;
Brown Scale, Colletotrichum sp., OR, WA;
Scale-tip,
Lily-of-the-Valley (Convallaria)
B
LIGHT
, Gray Mold; Rhizome Rot. Botrytis
paeoniae, IL, ME, PA.
B
LIGHT
, Southern. Sclerotium rolfsii, ME.
L
EAF
B
LOTCH
.
Ascochyta
majalis
(
Mycosphaerella convallaris
), PA.
L
EAF
S
POT
. Gloeosporium convallariae, NY;
Kabatiella microsticta, secondary, MD;
Phyllosticta sp., NJ, NY; Phytophthora
citricola (also foliar blight), CA.
N
EMATODE
, Meadow. Pratylenchus pratensis,
associated with forcing failures.
N
EMATODE
, Root Knot. Meloidogyne
sp.,
occasional.
Linaria (Blue Toadflax; Butter and
Eggs)
Cylindrocarpon
radicicola,
secondary.
R
OT
, Bulb. Penicillium spp., blue mold; Rhizo-
pus sp., soft rot, cosmopolitan.
R
OT
,Charcoal.Macrophomina phaseoli,CA.
A
NTHRACNOSE
. Colletotrichumvermicularioides,
MA, NJ, NY, TX, WI.
