Biology Reference
In-Depth Information
N
ONPARASITIC
. Internal Breakdown. Perhaps
from chilling.
Internal Brown Spot. Boron deficiency.
Intumescence. High water intake and retarded
transpiration.
R
OT
, Black. Ceratocystis fimbriata, general on
roots, stems; Diplodia theobromae
(
Physalospora rhodina
), Java black rot, general
in South.
R
OT
, Charcoal. Macrophomina phaseoli,NJto
FL, TX, CA, KS.
R
OT
, Gray Mold. Botrytis cinerea, on sprouts,
cosmopolitan.
R
OT
, Root. Diaporthe batatis, dry rot, stem rot,
NJ to FL, MO, TX; Helicobasidium
purpureum, KS, TX; Pyrenochaeta
terrestris, pink root, CA; Phymatotrichum
omnivorum, AZ, NM, OK, TX;
Phytophthora sp., NJ, PA; Plenodomus
destruens, foot and storage rot, NJ to FL,
CA, IA, LA; Pythium spp., mottle necrosis,
leak, ring rot; Fusarium solani, NC;
Geotrichum candidum, LA, NC.
R
OT
, Soil; Pox. Streptomyces ipomoea, general,
NJ to FL, TX, AZ, CA, IA.
R
OT
, Sprout; Stem Canker. Rhizoctonia solani,
occasional, NJ to FL, AZ, CA, OH, TX, WA.
R
OT
, Storage. Fusarium spp., general; Mucor
racemosus, occasional after chilling; Penicil-
lium sp., blue mold, cosmopolitan; Rhizopus
spp., soft rot, general; Sclerotinia sp., NC;
Trichoderma spp., DE, NJ; Aspergillus
spp., secondary.
R
UST
. Coleosporium ipomoeae (II, III), AL, MS;
0, I on pine.
S
CURF
. Monilochaetes infuscans, general.
S
LIME
M
OLD
. Fuligo violacea, AL, DE, NJ, TX;
Physarum cinereum; P. plumbeum, AL,
AR, KY, MS, NC, VA.
V
IRUS
. Sweet Potato Feathery Mottle (Yellow
Dwarf); Sweet Potato Internal Cork,
GA, LA, MD, MS, NC, SC, TN, VA; Sweet
Potato Mosaic (Tobacco Mosaic); Tobacco
Ring Spot; Beet Curly Top; Sweet Potato
Russet Crack; Sweet Potato Chlorotic
Stunt, NC.
W
HITE
R
UST
. Albugo ipomoeae-panduratae,
general.
W
ILT
. Fusarium oxysporum f. sp. batatas,
stem rot, general; Verticillium alboatrum,
CA.
Select varieties resistant to Fusarium stem rot,
in general the Spanish group. Heat treatment
eliminates some viruses. Hot water (10 min at
120
F) controls scurf. Variety Nemagold is resis-
tant to root-knot nematodes.
Sweet-Root (Osmorhiza)
L
EAF
G
ALL
.
Urophlyctis
(
Physoderma
)
pluriannulata, MT.
L
EAF
S
POT
. Cercospora osmorhizae, IL, OH,
WI; Fusicladium angelicae, WA;
Phloeospora osmorhizae, IA, NY, WI;
Ramularia reticulata, WI, VA; Septoria
aegopodii, NY, ND, OH, WI.
R
UST
. Puccinia pimpinallae (0,
I,
II,
III),
general.
Sweet Vetch (Hedysarum)
B
LACK
M
ILDEW
. Parodiella perisporioides, NY.
L
EAF
S
POT
. Septogloeum hedysari, WY.
N
EMATODE
, Root Knot. Meloidogyne sp.
R
UST
. Uromyces hedysari-obscuri (0, I, II, III),
AK, CO, ID, MT, NM, SD, UT, WY.
Sweet William (Dianthus barbatus)
A
NTHRACNOSE
. Volutella dianthi, DE, IN, NY.
B
ACTERIAL
, MLO. California Aster Yellows,
CA.
B
LIGHT
, Cutting. Cylindrocladium scoparium
and C. floridanum, FL, OH.
B
LIGHT
, Southern. Sclerotium rolfsii, CT, FL,
NC.
L
EAF
S
POT
. Phyllosticta sp. (
Ascochyta dianthi
),
WA; Septoria dianthi, AL, IA, MI, NY.
N
EMATODE
, Leaf and Stem. Ditylenchus dipsaci,
OR.
N
EMATODE
, Root Knot. Meloidogyne sp., FL, TX.
R
OT
,
Root.
Pythium ultimum,
CA;
Phymatotrichum omnivorum, TX.
