Host Plants - Westcott's Plant Disease - page 426

alternata, CA; A. arborescens, CA;

Alliaria (Garlic Mustard)

A. tenuissima, CA.
N EMATODE , Lesion. Pratylenchus vulnus, CA.
N EMATODE , Root Knot. Meloidogyne sp., AZ.
N ONPARASITIC . Bud Failure. Seed transmitted,
increased by pruning.
Chlorosis. Iron deficiency.
Little Leaf. Zinc deficiency.
P OWDERY M ILDEW . Podosphaera tridactyla, CA;
Sphaerotheca pannosa, CA.
R OT , Fruit. Phomopsis amygdali, CA, and asso-
ciated branch dieback.
R OT ,GreenFru .Sclerotinia sclerotiorum,
CA.
R OT , Heart. Polyporus versicolor, OR.
R OT , Hull. Rhizopus spp.
R OT , Root. Armillaria mellea, CA, NC;
Phymatotrichum omnivorum, TX.
R OT , Wound. Schizophyllum commune, CA.
R UST . Tranzschelia discolor (II, III); 0, I on
anemone, CA.
S CAB . Cladosporium carpophilum,CA,CT,OR.
V IRUS . Almond Bud Failure; Almond Calico,
CA; Peach Mosaic; Peach Ring Spot; Peach
Rosette; Peach Yellow Bud Mosaic; Peach
Yellows.
W ILT . Verticillium albo-atrum, CA, IL.
Crown rot and Armillaria rot are often
limiting factors in almond production. At
least five sprays are necessary to control
brown rot, leaf blights, and scab, and
often a zinc sulfate spray for little leaf. The
California Agricultural Experiment Station
Extension Service provides, each year, a revised
“Spray, Dust and Fumigation Program for
Almonds”.

R OT , Root. Fusarium solani, IL.
V IRUS . Cucumber Mosaic, OH.

Allionia (Trailing Four-O'Clock)

D OWNY M ILDEW . Peronospora oxybaphi,

KS, SD.
L EAF S POT . Ascochyta oxybaphi,

IA, WI;

Cercospora oxybaphi, IA, KS, WI.
R OT , Root. Phymatotrichum omnivorum, TX.
R UST . Puccinia aristidae, AZ, NM, TX.
W HITE R UST . Albugo platensis, AZ, NM,
TN, TX.

Allspice (Pimenta)

R UST . Puccinia psidii, FL.

Almond (Prunus amygdalus)

A NTHRACNOSE . Colletotrichum acutatum, CA.
A NTHRACNOSE ; Kernel Rot.

Gloeosporium

amygdalinum, CA.
B ACTERIAL Crown Gall. Agrobacterium
tumefaciens, AL, AZ, CA, NC.
B ACTERIAL Leaf Spot. Xanthomonas pruni, NE.
B ACTERIAL Shoot Blight; Blast. Pseudomonas
syringae, CA.
B LIGHT , Blossom; Brown Rot. Monilinia laxa,
CA, OR; Botrytis cinerea.
B LIGHT , Leaf; Shot-Hole Disease. Coryneum
carpophilum, CA, ID, OR.
C ANKER ;D IEBACK ; Crown Rot. Phytophthora
cactorum, CA, P. citrophthora, CA;
Botryosphaeria dothidea (Dothiorella can-
ker) CA; Ceratocystis fimbriata, CA.
C ANKER ,

Almond, Flowering (Prunus triloba)

B ACTERIAL Fire Blight. Erwinia amylovora, IN.
B ACTERIAL Spot. Xanthomonas pruni, NJ.
B LIGHT , Blossom and Twig. Botrytis cinerea,
NY; Monilinia fructicola, CT, KS.
P OWDERY M ILDEW . Podosphaera oxyacanthae,
IA.
R OT , Mushroom Root. Armillaria mellea, MS;
White Root, Corticium galactinum,MD.

Pruning Wound. Phytophthora

syringae, CA.
D ECLINE , Almond. Unknown etiology, CA.
“Golden Death”.
L EAF S POT . Cercospora circumscissa, CA, OR;
Hendersonia rubi, CA; Alternaria