Biology Reference
In-Depth Information
rhodina, AL; Phymatotrichum omnivorum,
TX; Pythium deliense, AZ, TX; Rhizopus
arrhizus,WY;Fusarium oxysporum f. sp.
betae, CO, MT.
R
OT
, Violet Root. Helicobasidium purpureum,
occasional.
R
OT
, Wound, Storage. Aspergillus fumigatus,
MI; Rhizopus spp., cosmopolitan;
Cylindrocarpon radicicola, NY; Penicil-
lium spp.; Fusarium spp.
R
UST
. Puccinia aristidae (0, I), CO, KS, NM,
UT; II, III on grasses; P. subnitens, NE;
Uromyces betae (II, III), AZ, CA, NM, OR.
S
CAB
. Streptomyces scabies, widespread.
S
CAB
, Acid. Streptomyces acidiscabies, ME.
V
IRUS
. Beet Black Scorch, CO; Beet Curly Top;
Beet Latent; Beet Mosaic; Beet Pseudo-Yel-
lows; Beet Ring Mottle; Beet Savoy; Beet
Yellow Net; Beet Yellows; Beet Yellow
Vein; Cucumber Mosaic; Beet Necrotic Yel-
low Vein, CA, NE, TX, WA; Beet Necrotic
Yellow Vein (Vector,
Polymyxa beta
,
Rhizomania disease), CA, MN, TX, WA;
Beet Western Yellows, CA; Lettuce chloro-
sis, CA; Lettuce Infectious Yellows, AZ, CA;
Beet Distortion Mosaic, CA; Beet 2
Alphacryptovirus; Lettuce Speckles Mottle,
CA; Beet Soilborne; Beet Soilborne Mosaic,
MN; Curtoviruses, AZ.
W
HITE
R
UST
. Albugo bliti, IA, OH.
W
ILT
. Verticillium albo-atrum, CO.
W
ILT
; Yellows. Fusarium sp., MN; Fusarium
conglutinans (F. orthoceras) var. betae; F.
graminearum (sugar beets) MN, WY.
Most of the troubles are more important for
commercially grown sugar beets. Cercospora leaf
spot or blight is common on garden beets
although spraying is not often practical. Boron
deficiency can be prevented by treating soil with
borax.
Begonia
B
ACTERIAL
Crown
Gall.
Agrobacterium
tumefaciens, CT, MS, TX.
B
ACTERIAL
Spot.
Xanthomonas
begoniae,
general.
B
LIGHT
, Gray Mold.
Botrytis
cinerea,
cosmopolitan.
L
EAF
S
POT
, Anthracnose. Gloeosporium sp., FL,
LA, MA, MS, NJ, TX; Cercospora sp., FL,
GA, MS, NJ, TX; Penicilliumbacillosporium,
secondary; Phyllosticta sp., NJ, PA.
N
EMATODE
, Leaf. Aphelenchoides fragariae,
cosmopolitan
in
greenhouses;
Lesion,
Pratylenchus sp.
N
EMATODE
, Root Knot. Meloidogyne spp., cos-
mopolitan in gardens in the South, green-
houses in the North.
N
ONPARASITIC
. Oedema. A water-soaked spot-
ting, frequent in house plants.
P
OWDERY
M
ILDEW
. Golovinomyces
cichoracearum, CA; Oidium sp., CA, FL,
NC; Oidium begoniae, OH.
R
OT
,
Root.
Armillaria mellea,
CA;
Thielaviopsis basicola, MA, OH.
R
OT
, Root and Stem. Pythium spp., CA, MO;
Rhizoctonia solani, cosmopolitan;
Sclerotinia sclerotiorum, CA: Sclerotium
rolfsii, IL.
V
IRUS
. Impatiens Necrotic Spot, NC; Tomato
SpottedWilt, CA, MO, OK, TX; Broad Bean
Wilt,MN.
W
ILT
. Verticillium albo-atrum, CT, NY; Fusar-
ium foetens, CT, Ontario Canada.
The dry air of the average living room keeps leaf
diseases at a minimum. Overwatering may foster
root rots and physiological oedema. In greenhouses
Botrytis blight, bacterial spot, leaf nematode,
and Pythium rots may become problems. Powdery
mildew is serious on tuberous begonias.
Beggarweed, Florida (Desmodium
tortuosum)
Bells-of-Ireland (Molucella)
L
EAF
S
POT
. Cercospora apii, CA, Texcoco,
Mexico.
R
OT
, Crown. Myrothecium sp., TX.
R
UST
. Phakopsora pachyrhizi, GA.
V
IRUS
. Tomato Spotted Wilt, GA.
