Host Plants - Westcott's Plant Disease - page 583

N EMATODE , Root-Knot Meloidogyne sp.
V IRUS . Alfalfa Mosaic, NJ.
Volutella leaf blight is fairly common after
injury or when plants are too crowded; pinkish
spore pustules appear on stems, large brown areas
on leaves.

L EAF S CORCH ; Leaf-Bitten Disease; Stem Bleed-
ing. Ceratocystis ( Endoconidiophora,
Thielaviopsis ) paradoxa, FL.
L EAF S POT , Gray; Leaf Break. Pestalotia

palmarum, secondary, FL.
R OT , Bud; Leaf Drop; Wilt. Phytophthora
palmivora, FL; Pythium sp., wilt, FL.

Pacific Wax Myrtle (Myrica californica)

Palm, Date (Phoenix)

L EAF S POT . Phyllosticta myricae, CA.
R UST . Cronartium comptoniae (II, III), OR.

B LIGHT , Inflorescence; Fruit Rot. Fusarium
spp., AZ.
C ANKER . Penicillium vermoeseni, CA.
F RUIT S POT , Brown. Helminthosporium molle,
AZ; Alternaria citri, AZ, CA, TX.
L EAF S CORCH ; Black Heart; Bud Rot.
Ceratocystis paradoxa, AZ, CA.
L EAF S POT . Exosporium palmivorum, Gulf
states; Pestalotia sp., CA, FL; P. palmarum,
FL; Alternaria sp., AZ, CA, FL, TX;
Annellophora phoenicis, TX.
L EAF S POT ;S TEM L ESIONS . Colletotrichum
fragariae, FL.
N EMATODE , Root Knot. Meloidogyne spp., AZ,
CA.
N ONPARASITIC . Black Nose. Fruit checking from
rain and high humidity.
Chlorosis. Manganese deficiency, FL.
P HYTOPLASMA .Witches' Broom, GA, IL, IN, IA,
OH.
R OT ; Decline Disease. Omphalia pigmentata
and O. tralucida, CA.
R OT , Fruit. Aspergillus niger, Calyx-end, CA,
WA; Catenularia fuliginea, AZ, CA; Peni-
cillium roseum, AZ, CA; Pleospora
herbarum, CA; Phomopsis phoenicola,
CA; Alternaria stemphylioides, CA.
R OT , Leaf-stalk; Shoot Blight; Fruit Rot.
Diplodia phoenicum, AZ, CA.
R OT , Root. Armillaria mellea, CA;
Clitocybe tabescens, FL; Ceratostomella
radiciola, CA.
R OT , Wood. Poria spp., AZ, CA.
S MUT , False. Graphiola phoenicis, widespread.
W ILT . Fusarium oxysporum f. sp. canariensis,
LA, SC, TX; F. oxysporum f. sp. palmarum,
FL.

Painted Cup, Indian Paintbrush
(Castilleja)

L EAF S POT . Cercospora sp., AK.
P OWDERY M ILDEW . Erysiphe polygoni,
CO, WA; Sphaerotheca macularis, CO,
WA, WI.
R UST . Cronartium coleosporioides (II, III), CA,
CO, SD to NM, UT, WA, WY; 0, I on pine;
Puccinia andropogonis (0, I), CA, IA MT,
NM, WI; II, III on Andropogon ; P. castillejae
(II, III), CA, UT.

Palm (Chamaedorea)

L EAF S POT . Bipolaris setariae, FL; Exserohilum
( Helminthosporium )

rostratum, FL;

Phaeotrichoconis crotalariae, FL.
R OT , Stem. Gliocladium vermoeseni, FL.

Palm Areca (Chrysalidocarpus)

B LIGHT , Southern. Sclerotium rolfsii, CA.
L EAF S POT . Bipolaris setariae, FL; Exserohilum
( Helminthosporium ) rostratum, FL;

Phaeotrichoconis crotalariae, FL.

Palm, Coconut (Cocos)

B ACTERIAL , MLO. Lethal Yellowing, FL.
B LIGHT , Thread. Pellicularia koleroga, FL.