Biology Reference
In-Depth Information
Aloe
Amaryllis (includes Hippeastrum)
R
OT
, Root. Pythium ultimum, CA.
Immerse nursery plants of
Aloe variegata
in
hot water at 115
F for 30 min; place in cold
water; dry; replant.
B
LIGHT
, Gray Mold; Bulb Rot. Botrytis cinerea,
occasional, chiefly in outdoor plantings after
chilling.
B
LIGHT
, Southern; Bulb Rot. Sclerotium rolfsii,
FL, TX.
L
EAF
SCORCH; Red Blotch. Stagonospora
curtisii, general.
L
EAF
S
POT
. Cercospora amaryllidis, AL, LA;
Colletotrichum
Alstroemeria
V
IRUS
. Alstroemeria Mosaic; Alstroemeria,
NY.
crassipes;
Fusarium
bulbigenum;
Melanospora
fallax;
Epicoccum purpurascens, secondary.
N
EMATODE
, Lesion. Pratylenchus scribneri, FL.
Scutellonema brachyurus, FL.
R
OT
, Bulb. Rhizopus stolonifer.
R
OT
, Seedling Root. Pythium debaryanum, FL,
TX; Root, Armillaria mellea, CA.
V
IRUS
. Cucumber Mosaic, FL; unidentified
Mosaic, CA, FL, OK, WI; Tomato
Spotted Wilt, CA, TX; Hippeastrum
Mosaic.
Although amaryllis is subject to red spotting
from various physiological causes, mite,
and insect injuries, the fungus leaf scorch or red
blotch is fairly common, with red spots on leaves,
flower stalks, and bulb scales.
Alternanthera
L
EAF
S
POT
, Phyllosticta amaranthi, NJ.
N
EMATODE
, Root Knot. Meloidogyne sp.
R
OT
, Root. Rhizoctonia solani, NJ.
R
OT
, Root; Wilt. Fusarium oxysporum, NJ.
V
IRUS
. Alternanthera Mosaic, FL.
Alyssum (Goldentuft, Yellowtuft)
C
LUB
R
OOT
. Plasmodiophora brassicae, NJ.
D
AMPING
-O
FF
. Rhizoctonia solani, NJ.
Amaranthus (Love-Lies-Bleeding,
Princes-Feather, Joseph-Coat, Spiny
Amaranth)
Amaryllis, Wild (Nothoscordum
bivalve; N. inodorum)
V
IRUS
. Nothoscordum Mosaic, LA.
B
ACTERIAL
, MLO. Aster Yellows, MD, NY.
C
ANKER
, Stem. Diaporthe phaseolorum var.
caulivora, LA.
D
AMPING
-O
FF
. Pythium debaryanum, CT.
L
EAF
S
POT
. Cercospora canescens, MD.
N
EMATODE
, Root Knot. Meloidogyne
Amelanchier (Serviceberry, Juneberry)
B
ACTERIAL
Fire Blight. Erwinia amylovora,
widespread.
B
LACK
M
ILDEW
; Witches Broom. Apiosporina
collinsii, widespread.
B
LIGHT
, Leaf. Fabraea maculata, widespread.
B
LIGHT
, Fruit and Leaf. Monilinia gregaria, CO,
IA, WA.
C
ANKER
.
sp.,
FL, MD.
R
OT
, Root. Phymatotrichum omnivorum,
TX.
R
OT
, Stem. Macrophomina phaseolina, AZ.
V
IRUS
. Beet Curly Top, CA, TX; Alfalfa
Mosaic, WA.
W
HITE
R
UST
. Albugo bliti, MA to FL, NE,
SC, TX.
Nectria
cinnabarina,
occasional;
Pezicula
pruinosa,
wide-spread;
Gloeosporium perennans, OR.
