Biology Reference
In-Depth Information
L
EAF
S
POT
. Alternaria sp., seedling blight, DE,
NH; A. alternata, blight, WI; Ascochyta pisi,
general but rare in Northwest; Cercospora
pisa-sativae, GA; Fusicladium pisicola,
black leaf, ID, UT; Pleospora hyalospora,
MS; Septoria flagellifera, MN, ND, SD,
WI; S. pisi, widespread; Stemphylium
polymorphum, ME.
N
EMATODE
, Hop Cyst. Heterodera humuli, OR.
N
EMATODE
, Lesion. Pratylenchus neglectus,
P. thornei, ID.
N
EMATODE
, Oat Cyst. Heterodera avenae, WA.
N
EMATODE
, Pea Cyst. Heterodera gottingiana,
WA.
N
EMATODE
, Root Knot. Meloidogyne spp., AZ,
CA, FL, NC, SC, TX, UT, WI.
N
EMATODE
, Sting. Belonolaimus gracilis.
N
ONPARASITIC
. Chlorosis. Manganese or zinc
deficiency, FL, TX, WA.
Intumescence. Pod swellings, CA, NJ, WA.
Seed Spotting. Cause unknown.
P
INK
S
EED
. Erwinia rhapontici, ND.
P
OWDERY
M
ILDEW
. Erysiphe polygoni, general;
E. pisi, E. trifolii, E. baeumleri, WA.
R
OT
, Black Mold. Rhizopus stolonifer, cosmo-
politan;
V
IRUS
. Seed-borne; Pea Stunt, WI, Turnip
Mosaic Virus,MN.
W
ILT
. Fusarium oxysporum f. sp. pisi,NHto
SC, CA, CO, ID, IL, MN, NE, MT, OR, WA;
and race 2, Near Wilt; Fusarium oxysporum
f. sp. medicaginis, MS.
Resistant varieties are the answer to Fusarium
wilt and some virus diseases. Using clean seed,
preferably grown in the West, is the best way to
avoid bacterial blight. A well-drained, fertile soil,
3- to 5-year rotation, cleaning up or plowing
under pea refuse immediately after harvest, all
help to produce healthy peas. Some organic soil
amendments reduce pea wilt.
Peach (Prunus persica)
A
NTHRACNOSE
. Colletotrichum acutatum, SC.
B
ACTERIAL
Crown
Gall.
Agrobacterium
tumefaciens, general.
B
ACTERIAL
Hairy
Root.
Agrobacterium
rhizogenes, general.
B
ACTERIAL
Leaf Spot. Xanthomonas pruni, east-
ern, central, southern states.
B
ACTERIAL
, MLO. Peach X-Disease, CT, MA,
MI, NY, OH, PA.
B
ACTERIAL
Shoot Blight; Canker; Gummosis.
Pseudomonas syringae, CA, OR.
B
LIGHT
, Blossom; Green Fruit Rot. Sclerotinia
sclerotiorum, CA.
B
LIGHT
, Leaf. Fabraea maculata, CA, NJ.
B
LIGHT
; Shot-Hole Disease; Pustular Spot.
Coryneum carpophilum, general.
B
LIGHT
, Twig. Coniothyrium sp., TX; Cyphella
marginata, OR; Nectria cinnabarina, AL.
C
ANKER
, Crown. Phytophthora citrophthora,
CA; P. cactorum, stem, AR, CA; P. syringae,
OR.
C
ANKER
;D
IEBACK
; Gummosis. Botryosphaeria
ribis var. chromogena, FL, GA; B. dothidea,
AL, FL, GA, LA, TN, TX; Valsa (
Cytospora
)
cincta and V. leucostoma, widespread East
and central states; Coniothrium fuckelii,
WV; Ceratocystis fimbriata, CA.
C
ANKER
; Peach; Constriction Disease.
Fusicoccum amygdali, East and South.
Sometimes reported as Phoma persicae.
gray mold,
Botrytis
cinerea,
occasional.
R
OT
, Foot. Aphanomyces euteiches, general
except in far North.
R
OT
, Root. Aphanomyces euteiches, ID, MN;
Fusarium solani f. sp. pisi, widespread;
Pellicularia filamentosa, stem canker, gen-
eral; Phoma sp., NJ, WI; Pyrenochaeta
terrestris, I ; Phymatotrichum
omnivorum, TX; Phytophthora sp., CA,
CT; Thielaviopsis basicola, AR, CA; Rhizoc-
tonia oryzae,WA.
R
OT
, Stem and Root. Rhizoctonia solani, ND.
R
OT
, Stem; Wilt. Sclerotinia sclerotiorum, CA,
DE, FL, ID, MT, NJ, PA, TX, VA, WA.
R
UST
. Uromyces fabae (0, I, II, III), CA, ID, ME,
MA, MN, NE, ND, WA, WY.
S
CAB
; Black Spot; Leaf Mold. Cladosporium
pisicola, CA, ME, OR, TX, UT, WA.
V
IRUS
. Pea Enation Mosaic; Pea Mosaic; Pea
Mottle; Pea Streak; Wisconsin Pea Streak;
PeaWilt; Clover (red) VeinMosaic; Tomato
Spotted Wilt; Bean Leaf Roll, CA.
