Host Plants - Westcott's Plant Disease - page 605

Northwest; Polyporus hirsutus;

Plumeria (Frangipani)

P. versicolor, wide-spread.
R OT , Pink Mold. Trichothecium roseum, CA.
R OT , Root. Armillaria mellea, widespread;
Phymatotrichum omnivorum, TX.
R OT , Silver Leaf. Stereum purpureum,WA.
R UST . Tranzschelia discolor (II, III), widespread,
especially in South and Pacific Coast states; 0,
I on anemone; T. pruni-spinosae (II, III); 0, I,
on anemone, hepatica, thalictrum, buttercup.
S CAB . Cladosporium carpophilum, widespread.
V IRUS . Plum Line Pattern; Plum White Spot;
Prune Diamond Canker; Prune
Constricting Mosaic; Prune Dwarf; Cherry
Vein Clearing; Little Peach; Peach Mosaic;
Peach Rosette; Peach Yellows; Ring Spot;
PlumRusty Blotch; Apricot Ring Pox; Stem
Pitting; Cherry Green Ring Mottle, North
America.
W ILT ; Seedling Black Heart. Verticillium albo-
atrum.
Plums are even more subject to brown rot than
peaches and take the same spray schedule. This
includes insect control to avoid infection through
feeding injuries. Black knot is sometimes con-
spicuous on twigs, but diseased portions can be
pruned out and a dormant

L EAF S POT . Cercospora plumeriae, FL.
M ISTLETOE .

Phoradendron serotinum

(flavescens), FL.
R OT , Root. Phymatotrichum omnivorum, TX.
R UST . Coleosporium domingense (II, III), FL;
C. plumeriae, HI, LA.

Podocarpus

N EMATODE , Burrowing. Rodopholus similis,FL.
R OT , Root. Clitocybe tabescens, FL.

Poinciana (Caesalpinia)

A NTHRACNOSE . Gloeosporium sp., FL.
B ACTERIAL Crown Gall. Agrobacterium

tumefaciens, FL.
R OT , Root. Clitocybe tabescens, FL;

Phymatotrichum omnivorum, TX.
R UST . Ravenelia humphreyana (II, III), FL.

lime-sulfur spray

Poinsettia (Euphorbia pulcherrima)

applied.

B ACTERIAL Bract Spot. Clavibacter cassiicola,FL.
B ACTERIAL Canker; Leaf Spot. Clavibacter
poinsettiae, MD, NJ, NY, PA; Pseudomonas
viridiflava, CA, FL.
B ACTERIAL , Greasy Canker. Pseudomonas
viridiflava, CA, FL.
B ACTERIAL

Plum, Wild (Prunus americana)

B LOTCH Sooty. Zygophiala jamaicensis, IA.
F LYSPECK , Fruit. Pseudocercosporella spp.

Leaf Spot. Xanthomonas

poinsetriaecola, FL.
B ACTERIAL Stem Rot. Erwinia carotovora pv.
chrysanthemi, CT, MI, OH, PA, WV.
B LIGHT , Tip; Stem Canker. Botrytis cinerea,
MO, TX, WA.
C ANKER , Stem. Fusarium solani, WI.
L EAF S POT . Cercospora pulcherrimae, TX;
Corynespora cassiicola, LA.
N EMATODE , Root Knot. Meloidogyne sp., NY;
M. incognita.
N ONPARASITIC . Chlorosis. Possibly due to cloudy
weather.

Plumegrass (Erianthus)

A NTHRACNOSE . Colletotrichum falcatum, LA.
E RGOT . Claviceps purpurea, AL, OK.
L EAF S POT ; Mold. Cladosporium erianthi, SC;
Curvularia sp., FL; Helminthosporium sp.,
FL; Phyllachora erianthi, tar spot, AL, FL,
GA, SC.
R UST . Puccinia virgata (II, III), GA; P. polysora
(II, III), 0, I unknown.