Biology Reference
In-Depth Information
V
IRUS
. Beet Curly Top; Mosaic, unidentified,
FL, TX; Tomato Spotted Wilt, TX.
W
ILT
. Fusariumsp., NJ; Verticilliumdahlia,CA.
P
OD
S
POT
, Black; Seed. Phomopsis longicolla,
MS.
R
OT
, Root. Phytophthora megasperma, NC.
V
IRUS
. Brome Mosaic, CA; Cowpea Aphid-
Borne Mosaic, AR; Cowpea Severe Mosaic,
AR, IN, LA.
W
ILT
.
Cotoneaster
Fusarium
oxysporum
f.
sp.
B
ACTERIAL
Fire Blight. Erwinia amylovora,
widespread.
B
ACTERIAL
tracheiphilum, CA.
Cowpeas are of most interest to gardeners as
a green manure crop, and there is little need of
repeating here the long list of possible dis-
eases, most of which are given under Bean.
Ashy stem blight, charcoal rot, is fairly serious.
The root-knot nematode is general, but varie-
ties Iron and Bragham are almost immune.
Fusarium wilt, general in the South, is largely
controlled by using resistant varieties. Leaf
spots are numerous, and some may cause defo-
liation. Rust is widespread on Blackeye and
related varieties, but many varieties
Hairy
Root.
Agrobacterium
rhizogenes, central states.
C
ANKER
, Twig Blight. Physalospora obtusa,NY
to OH, TX; Diplodia
sp., TX; Gibberella
baccata, CA.
L
EAF
S
POT
. Fabraea maculata, CA, IA;
Phyllosticta cotoneastri, MD; P. cydoniae,
MS.
P
OWDERY
M
ILDEW
. Podosphaera sp., CA.
R
OT
, Root. Armillaria mellea, CA; Clitocybe
tabescens, FL; Phymatotrichum
omnivorum, AZ, TX; Phytophthora sp.
S
CAB
. Venturia sp., WA.
are
resistant.
Crabapple, Flowering (Malus)
Cotton (Gossypium)
A
NTHRACNOSE
.
Northwestern.
Neofabraea
C
ANKER
, Stem. Phoma exigua, NC, VA.
N
EMATODE
. Rotylenchus reniformis, VA.
R
OT
, Lint. Nigrospora oryzae, AL.
R
OT
, Root. Rhizoctonia solani, MS.
R
OT
, Stem. Sclerotinia sclerotiorum, ND.
malicorticis, OR.
B
ACTERIAL
Fire Blight.
Erwinia amylovora,
widespread.
B
LIGHT
, Thread. Pellicularia koleroga, LA.
B
LOTCH
, Sooty. Gloeodes pomigena, IN.
C
ANKER
, Blister. Nummularia discreta,WV.
C
ANKER
, Coral Spot; Twig Blight. Nectria
cinnabarina, AK.
C
ANKER
;D
IEBACK
. Valsa leucostoma, WV;
Physalospora obtusa, MI; Sphaeropsis
pyriputrescens, WA; Phacidiopycnis
washingtonensis (also Fruit Rot), WA.
L
EAF
S
POT
. Cercosporella pirina, IL, WI;
Coniothyrium pirinum, WI; Fabraea
maculata, AK, MD; Illosporium
malifoliorum, WV; Marssonina coronaria,
IN, IA, MO, WI; Phyllosticta sp., IA;
P. solitaria, IN, IA, KS, OH, TX, WV;
P. zonata,IA;Septoria pyri.
M
ISTLETOE
, European. Viscum album, CA.
P
OWDERY
M
ILDEW
. Oidium pyrinum, WI;
Phyllactinia corylea, WA;
Coursetia
R
UST
. Phragmopyxis
acuminata
(0,
III),
AZ, CA.
Cowania
R
UST
. Phragmidium andersonii (I, II, III), ID.
Cowpea (Vigna sinensis)
L
EAF AND
S
TEM
D
ISEASE
. Cercospora cebrina
(clover isolate), NC.
Podosphaera
