Biology Reference
In-Depth Information
L
EAF
S
TRIPE
. Burkholderia gladioli, Mexico.
L
ESIONS
, Stem. Rhizoctonia solani, MS.
N
EMATODE
, Lesion. Pratylenchus penetrans.
N
EMATODE
, Root Knot. Heterodera zeae, VA;
Meloidogyne
Corncockle (Agrostemma)
L
EAF
S
POT
. Gloeosporium sp., IN; Marssonina
delastrei, IL, IN, MI, MS, MO; Septoria
lychnidis var. pusilla, ND.
R
OT
, Root. Phymatotrichum omnivorum, TX.
R
OT
, Stem. Fusarium sp., IN.
chitwoodi,
Pacific NW;
M. hapla, Pacific NW.
R
OOT
D
ISEASE
. Fusarium oxysporum, F. solani,
F. acuminatum, F. proliferatum,MN.
R
OT
, Black Bundle Disease. Cephalosporium
acremonium, MT.
R
OT
, Dry Ear. Nigrospora sorghi, IA.
R
OT
, Ear, Root and Stalk; Seedling Blight.
Diplodia zeae, ME to VA, SD, TX; Fusarium
spp.;
Corn-Marigold (Chrysanthemum
segetum)
F. moniliforme,
cosmopolitan;
B
ACTERIAL
,MLO.California Aster Yellows,CA.
L
EAF
S
POT
. Septoria chrysanthemi, NY.
Burkholderia gladioli, MS.
R
OT
, Root. Gibberella zeae, chiefly east of Mis-
sissippi River; Phoma terrestris, DE, MD;
Pythium spp., IL, IA, OH, TX;
Helminthosporium pedicellatrum, CA;
Exserohilum pedicellatum, TX; Phomus
terrestris, NC.
R
OT
, Stem. Burkholderia gladioli, Mexico.
R
UST
. Puccinia sorghi (II, III), general; 0, I on
oxalis; P. polysora, GA, Southern U.S.
S
MUT
. Ustilago maydis, general, FL, IL, MI, MN,
NY, TX,WI; Sphacelotheca reiliana, Head
Smut.
S
MUT
, False. Ustilaginoidea virens, MS.
V
IRUS
. Barley Yellow Dwarf, IL; Corn Leaf
Fleck; Corn Mosaic, Corn Stunt, AL, AZ,
CA, GA, IN, KY, MO, SC; Wheat Streak
Mosaic, CO, ID, IN, KS, MI, NE, OH, TX,
UT; Cucumber Mosaic, celery strain; Maize
Chlorotic Mottle, HI, KS, NE; Maize Dwarf
Mosaic, AL, AZ, AR, CA, GA, ID, IA, MO,
NJ, NM, NY, OH, PA, WA; Maize Rayado
Fino; Maize Stripe, FL; Sorghum Stunt
Mosaic, CA; Oat Blue Dwarf. Marafivirus,
North America, Great Plains.
W
ILT
,S
TUNT
. Phytophthora sansomeana, OH.
W
ILT
,
Corydalis
D
OWNY
M
ILDEW
. Peronospora corydalis, IN,
MD, MA, OK, TX.
L
EAF
S
POT
. Septoria corydalis, TX, WI.
N
EMATODE
. Meloidogyne sp., FL.
R
UST
. Puccinia aristidae (0, I), CO, KS,
NE; II, III on grasses; P. brandegei (III)
CO, WA.
Cosmos
B
ACTERIAL
, MLO. Aster Yellows, DE, NJ, NY,
and California Aster Yellows, CA.
B
ACTERIAL
Wilt. Pseudomonas solanacearum,
NC.
B
LIGHT
, Southern. Sclerotium rolfsii, MS.
C
ANKER
, Stem Blight. Diaporthe stewartii,CT
to NJ, CA, KS, SD, TX.
D
ODDER
. Cuscuta sp., NY.
L
EAF
S
POT
. Cercospora sp., TX; Septoria sp.,
CT.
M
OLD
, Gray. Botrytis cinerea, Brazil.
N
EMATODE
, Root Knot. Meloidogyne sp.
P
OWDERY
M
ILDEW
. Golovinomyces
cichoracearum, CA, MD, NE, NC, TX.
R
OT
, Root. Phymatotrichum omnivorum,
AZ, TX; Macrophomina phaseoli, TX;
Pythium sp., MD; Rhizoctonia solani, CT,
MD, TX.
Vascular.
Pantoea
agglomerans,
Mexico.
W
ITCHWEED
. Striga asiatica, on roots, NC.
Smut is the most conspicuous corn disease in
home gardens. Bacterial wilt is dependent on
survival of insect vectors and may be serious
after a warm winter unless resistant hybrids are
used.