Host Plants - Westcott's Plant Disease - page 585

B LIGHT , Gray Mold. Botrytis cinerea, AK, LA,
NJ, probably general.
B LIGHT , Southern. Sclerotium rolfsii, FL, VA.
D AMPING -O FF ; Root Rot. Pythium spp., CA, CT,
MO, NJ; Rhizoctonia solani, DE, IL, MN,
NY.
D OWNY M ILDEW . Peronospora violae, AL, IL,
MS, NE.
L EAF S POT . Alternaria violae, NJ, NY, PA;
Cercospora violae, CT, IN, MI, NY, TX,
WI; Phyllosticta

Palmetto, Cabbage Palm (Sabal)

B LACK M ILDEW . Asterina sabalicola, FL, GA;
Meliola spp., Gulf states.
C ANKER , Felt Fungus. Septobasidium sabalis,
LA; S. sabal-minor, FL.
F RUIT D ROP (Premature). Colletotrichum
pleosporioides, FL.
L EAF S POT . Helminthosporium apiculiferum,
LA, MS; Mycosphaerella serrulata, FL,
SC; Phyllachora ( Catacauma ) sabal, Black
Spot, FL, GA, TX; Phyllosticta palmetto,
LA, MS; Myrianginella sabaleos, Black
Speck, FL, GA.
S MUT , False. Graphiola congesta, AL, FL, SC;
G. phoenicis, FL, MS; G. thaxteri, FL.

rafinesquii, AL, IL;

Ramularia agrestis, OR; R. lactea, WA.
N EMATODE ,RootKnot.Meloidogyne sp., NY, TX.
P OWDERY M ILDEW . Sphaerotheca macularis, IA,
KS, WA.
R OT ; Crown. Myrothecium roridum, AL.
R OT ; Leaf Spot. Centrospora acerina, CA, GA.
R OT , Root; Wilt. Aphanomyces cladogamus,
MD; Fusarium oxysporum, CT, MI, NE,
NJ, NY, OH, TX; Thielaviopsis basicola
( Chalara elegans ), CT.
R UST . Puccinia ellisiana (0, I), KS, NE; II, III on
Andropogon ; P. violae (0, I, II, III), CT, FL,
KS, NJ, ND, SC; Uromyces andropogonis
(0, I), CT; II, III on Andropogon .
S MUT ,Seed.Urocystis kmetiana,AR,MO,TN.
S POT A NTHRACNOSE ; Pansy Scab. Sphaceloma
violae, KY, MD, NJ.
V IRUS . Beet Curly Top, CA, OR, TX; Mosaic,
unidentified,MD;Western Cucumber
Mosaic and Cherry Calico cause flower
break and leaf mottle in CA; Tomato Spotted
Wilt - Lettuce Serotype, GA.

Paloverde (Cercidium)

M ISTLETOE . Phoradendron californicum,TXto
CA.
R OT ,Root.Phymatotrichum omnivorum,TX.

Pampas Grass (Cordaderia)

L EAF S POT . Helminthosporium sp., GA;
Hendersonia

culmiseda, leaf mold;

Phyllosticta sp., KY.

Pandanus (Screw Pine)

Papaya (Carica)

L EAF S POT . Heterosporium iridis, IA;
Macrophoma pandani, CA, FL;
Melanconium pandani, FL, MD; Phomopsis
sp., NJ; Pestalotia palmarum, secondary, FL;
Volutella mellea, NY.
N EMATODE , Burrowing. Radopholus similis, FL.

A NTHRACNOSE . Colletotrichum capsici, FL.
A NTHRACNOSE ; Fruit, Stem, and Leaf Spot.
Glomerella cingulata, general.
B LACK M ILDEW . Asterina caricarum, FL.
B LIGHT , Flower; Leaf Spot. Choanephora amer-
icana, FL.
B LIGHT , Southern. Sclerotium rolfsii, TX.
D AMPING -O FF . Pythium aphanidermatum, CA,
FL; P. debaryanum, TX; Colletotrichum
gloeosporioides, HI; also seedling blight.

Pansy (Viola tricolor)

A NTHRACNOSE . Colletotrichum violae-tricoloris,
ME to FL, IN, MI, PA, WA.