Host Plants - Westcott's Plant Disease - page 597

Polyporus spp.; Schizophyllum commune,
KY, TN.
W ILT . Cephalosporium diospyri, AL, AR, FL,
GA, MS, NC, OK, SC, TN, TX; Verticillium
albo-atrum, TX.
Persimmon wilt started in Tennessee in 1933,
and at the end of 5 years only 5 % of the persim-
mons in that native stand were alive. Oriental
persimmons are resistant.

Persimmon (Diospyros)

A NTHRACNOSE . Colletotrichum acutatum, NC.
A NTHRACNOSE ; Fruit, Twig, Blight.
Gloeosporium diospyri, East and South to
KS.
B ACTERIAL Crown Gall. Agrobacterium

tumefaciens, CA.
B ACTERIAL , Witches' Broom. MLO, TX.
B LIGHT , Thread. Pellicularia koleroga, FL, on
Japanese persimmon.
B LIGHT , Twig. Phoma diospyri, FL, SC;
Physalospora obtusa, Gulf states.
B LOTCH , Leaf. Mycosphaerella diospyri, Gulf
states.
C ANKER ;D IEBACK . Diplodia natalensis, AL, TX;
Botryosphaeria ribis, AL, LA, MD.
F RUIT S POT ; Flyspeck. Leptothyrium pomi, FL;
Macrophoma diospyri, AL, NJ, TX;
Dissoconium mali, IA, China.
L EAF S POT , Algal. Cephaleuros virescens, FL.
L EAF S POT , Brown. Cercospora diospyri, IL,
ME, MS, SC, TX, VA; Black, C. fuliginosa,
AL, FL, GA, IL, MS, TX; Pestalotia sp.,
secondary; Phyllosticta sp., FL, IN;
Ramularia sp., FL; Fusicladium levieri,
CT, FL, MS.
M ISTLETOE . Phoradendron serotinum
(flavescens), FL, TX; Viscum album, CA,
on Diospyros kakai (Japanese Persimmon).
N EMATODE , Citrus. Tylenchulus semipenetrans,
CA.
N EMATODE , Root Knot. Meloidogyne sp., FL, SC,
TX.
P OWDERY M ILDEW . Podosphaera oxyacanthae,
TX.
R OT , Fruit. Alternaria sp., occasional on Japa-
nese persimmon; Botrytis cinerea, gray
mold; Penicillium expansum, blue mold, cos-
mopolitan; Physalospora spp., AL, AZ, GA,
NY, TX; Rhizopus stolonifer, TX.
R OT ,

Petalostemon (Prairie-Clover)

R OT , Root. Phymatotrichum omnivorum, TX.
R UST . Puccinia andropogonis (0, I), ND to KS,
CO. TX, WY; Uropyxis petalostemonis (0, I,
II, III), WI to ND, CO, NM.

Petasites (Butter-Bur)

G ALL , Leaf. Synchytrium aureum, WI.
L EAF S POT . Ramularia variegata, WI;
Stagonospora petasitidis, WI.
R UST . Puccinia conglomerata, MI, MN, NY,
WI; P. poarum, AK.

Petunia

B ACTERIAL Fasciation. Clavibacter fascians, CA,
OH, PA.
B ACTERIAL , MLO. Aster Yellows.
B ACTERIAL Wilt. Pseudomonas solanacearum,
FL.
B LIGHT , of old flowers. Choanephora conjuncta,
GA; C. cucurbitarum (whole plant), LA;
Phytophthora infestans, CA, MD, NY;
Sclerotinia sclerotiorum, LA.
B LOTCH , Leaf. Cercospora petuniae, FL, OK.
D AMPING -O FF . Rhizoctonia solani, FL, NJ, NY,
NC, OK, PA, TX.
D ODDER . Cuscuta spp., MD, NJ, NY, OK, TX,
WV.
L EAF S POT . Ascochyta petuniae, TX.
N ONPARASITIC . Air Pollution Injury.
N EMATODE , Root Knot. Meloidogyne spp., gen-
eral in South, occasional in greenhouses.

Root. Armillaria mellea, CA;

Phymatotrichum omnivorum, TX.
R OT ,Wood.Daedalea ambigua,LA,MS;
Daldinia concentrica, LA, VA; Fomes spp.;
Hericium erinaceus,LA;Lentinus tigrinus,
LA, MS; Pleurotus ostreatus,LA,MS;