Biology Reference
In-Depth Information
R
OT
, Root. Phymatotrichum omnivorum, TX;
Rosellinia necatrix, CA.
S
OOTY
M
OLD
. Capnodium elongatum, TX;
Fumago salicina, TX.
W
ILT
. Verticillium albo-atrum, VA.
Hollyhock (Althaea)
A
NTHRACNOSE
. Colletotrichum malvarum,NY
to MS, IA, TX.
B
ACTERIAL
Hairy
Root.
Agrobacterium
rhizogenes, WI.
B
ACTERIAL
Wilt. Pseudomonas solanacearum,
NY, WV.
B
LIGHT
, Southern. Sclerotium rolfsii, AR.
B
LIGHT
, Web. Pellicularia filamentosa, TX.
C
ANKER
. Nectria cinnabarina, OK.
L
EAF
S
POT
. Alternaria spp., secondary;
Ascochyta althaeina, IN, MD, NJ, NY, PA,
WV; Cercospora althaeina, East and central
states to AL, SD, TX; C. kellermanii, IN,
MD, MN, MO, NJ, OH; Myrothecium
roridum,MD;Septoria malvicola, MI, MN,
NY, OH, OK, VT, WI.
N
EMATODE
, Lesion. Pratylenchus pratensis, TX.
N
EMATODE
, Root Knot. Meloidogyne spp., FL,
KS, MS, OK, TX.
P
OWDERY
Holly, West Indian (Leea coccinea)
L
EAF
S
POT
, Blight, Defoliation. Phytophthora
meadii,HI.
H
OLODISCUS
(Ocean Spray, Rock-Spirea)
C
ANKER
, Twig; Coral Spot. Nectria cinnabarina,
WA.
L
EAF
S
POT
. Cylindrosporium ariaefolium, OR;
Rhopalidium
cercosporelloidis,
ID,
Septogloeum schizonoti,WA.
P
OWDERY
M
ILDEW
. Podosphaera oxyacanthae,
ID, Phyllactinia corylea, WA.
V
IRUS
. Holodiscus Witches' Broom, OR, WA.
M
ILDEW
.
Golovinomyces
cichoracearum,
CA, MS;
Erysiphe
polygoni, IA.
R
OT
, Crown. Phytophthora megasperma, MD,
VA; Sclerotinia sclerotioum, MT, NJ.
R
OT
, Root. Phymatotrichum omnivorum,TX.
R
UST
. Puccinia malvacearum (III), general;
P. heterospora (III), CA, KS, MS, TX;
P. lobata, AZ, NM, TX; P. schedonnardi
(0, I), KS, MS, NE, ND; P. sherardiana (0,III),
CA; Endophyllum tuberculatum (III), CO,
KS, NE, OK.
V
IRUS
. Hollyhock Mosaic.
Rust is by far the most destructive disease of
hollyhocks, disfiguring foliage in most seasons
and some years causing nearly all leaves to
shrivel and die. Remove infected leaves and
stalks as noticed.
Homalomena
L
EAF
S
POT
. Glomerella cincta, NJ.
Honesty (Lunaria)
C
LUB
R
OOT
. Plasmodiophora brassicae, NJ.
L
EAF
S
POT
. Alternaria oleracea, black spot
of
leaves,
pods;
Helminthosporium
lunariae, MA.
R
OT
,
Root; Damping-off.
Aphanomyces
raphani, WI.
Honey Locust (Gleditsia)
B
ACTERIAL
Hairy
Root.
Agrobacterium
Holly Osmanthus (Osmanthus
ilicifolius)
rhizogenes, central states.
C
ANKER
. Dothiorella sp., MS; Cytospora
gleditschiae, IL; Physalospora obtusa.
C
ANKER
, Felt Fungus. Septobasidium curtisii,
AR, LA.
L
EAF
S
POT
. Phyllosticta oleae, TX.
N
EMATODE
, Root Knot. Meloidogyne sp.
