Biology Reference
In-Depth Information
Leucotho
¨
Lilac (Syringa)
B
LACK
M
ILDEW
. Asterina diplodioides, AL.
B
LIGHT
, Leaf Spot. Cylindrocladium
avesiculatum, GA; C. colhounii, NC.
B
LIGHT
, Ramorum. Phytophthora ramorum,
PA.
C
ANKER
, Felt Fungus. Septobasidium pseudope-
dicellatum, FL.
G
ALL
, Leaf. Exobasidium vaccinii,MA,MS,NC.
L
EAF
S
POT
. Cercospora leucotho¨s, NJ, NY;
Cryptostictis sp.; Guignardia leucotho¨s,
MD, NC, RI, SC, TN, VA; Mycosphaerella
leucotho¨s, NJ; Phyllosticta terminalis,NY
to FL; Ramularia andromedae, NJ;
Rhytisma decolorans, tar spot, CT, FL, TN,
VA. Pestalotia leucotho¨s, NJ.
P
OWDERY
M
ILDEW
. Microsphaera penicillata,
GA.
S
POT
A
NTHRACNOSE
. Elsino¨ ledi, FL.
A
NTHRACNOSE
, Shoot Blight.
Gloeosporium
syringae, CT, MA.
B
ACTERIAL
Crown
Gall.
Agrobacterium
tumefaciens, CT.
B
ACTERIAL
Blight; Twig Canker. Pseudomonas
syringae, northeastern states
to AL,
IL,
Pacific Coast.
B
LIGHT
, Blossom, Shoot. Phytophthora
cactorum,IA,MD,MA,MN,NJ;P. syringae,
MD, NY; Sclerotinia sclerotiorum,WA.
B
LIGHT
, Cutting. Cylindrocladium scoparium
and C. floridanum, FL, OH.
B
LIGHT
, Gray Mold. Botrytis cinerea. Pacific
Northwest, Northeast.
B
LIGHT
, Ramorum. Phytophthora ramorum,PA.
B
LIGHT
, Thread. Pellicularia koleroga, FL, MS,
NC.
B
ACTERIAL
, Witches Broom. MLO, IL.
B
LOTCH
, Leaf. Heterosporium syringae, NJ;
Cladosporium
herbarum,
secondary,
Lewisia (Bitterroot)
cosmopolitan.
C
ANKER
;
Stem
Girdle.
Hymenochaete
R
UST
. Uromyces unitus (I, III), CA, MT, WA.
agglutinans, CT.
C
ANKER
;D
IEBACK
. Physalospora obtusa,MAto
VA, OH.
L
EAF
S
POT
. Cercospora lilacis, widespread;
Macrophoma halstedii, CT, NJ, NY;
Phyllosticta sp., MA; Pleospora herbarum,
secondary, MD.
N
EMATODE
, Citrus. Tylenchulus semipenetrans.
N
ONPARASITIC
. Blight. Graft incompatibility of
lilac scion on privet stock.
P
OWDERY
M
ILDEW
. Microsphaera alni, general.
P
HYTOPLASMA
. Witches' Broom, IL; Ash Yel-
lows, MD, ND.
R
OT
, Root. Phymatotrichum omnivorum, TX;
Armillaria mellea, CA, MS; Thielaviopis
basicola, CT.
R
OT
, Wood. Polyporus gilvus, MD; Stereum
purpureum, OK.
V
IRUS
. Lilac Mottle; Lilac Ring Spot, MI, MN;
Lilac Witches' Broom,MD.
Powdery mildew is the most general and con-
spicuous disease of lilacs, but it comes too late in
the season to damage the bushes materially. It can
Liatris (Gayfeather)
D
ODDER
. Cuscuta glomerata, OK.
L
EAF
S
POT
. Phyllosticta liatridis, WI; Septoria
liatridis, MN, ND, TX, WI.
N
EMATODE
, Root Knot. Meloidogyne sp.
P
OWDERY
M
ILDEW
.
Golovinomyces
cichoracearum, OK.
R
OT
,Root.Phymatotrichum omnivorum,TX.
R
OT
, Stem. Sclerotinia sclerotiorum, NY.
R
UST
. Coleosporium laciniariae (II, III), NJ to
FL, AR, TX; 0, I on pines; Puccinia liatridis
(0, I), IN, KS, MT, NE, ND, WI to CO; II, III
on grasses.
W
ILT
. Verticillium albo-atrum, NJ.
Ligustrum
Privet.
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