Host Plants - Westcott's Plant Disease - page 573

Ramularia variabilis, NY to MS, TX, WA;
Septoria verbasicola, TX, NY to AL, MO,
TX.
N EMATODE , Root Knot. Meloidogyne sp.
P OWDERY M ILDEW . Golovinomyces
cichoracearum, PA; Oidium sp., NJ.
R OT , Root, Phymatotrichum omnivorum, TX.
V IRUS . Tomato Ringspot, VT.

R OT , Root; Damping-off. Aphanomyces
raphani, WI.
R UST . Puccinia aristidae (0, I), CO; II, III on
grasses.
V IRUS . Cauliflower Mosaic; Turnip Mosaic;
Tobacco Stread, CA.
W ILT . Fusarium sp.

Myrtle (Myrtus)

Mushroom, Oyster (Pleurotus
ostreatus) L EAF S POT . Pestalotia decolorata, LA.

R OT , Root. Cylindrocladiumpauciramosum,CA.
R OT , Stem. Sclerotium rolfsii, FL.
R UST , Puccinia vincae, CA.

D RY B UBBLE . Verticillium fungicola, PA.

Musk-Root (Adoxa)

Nandina

G ALL , Leaf. Synchytrium anomalum, IA.
L EAF S POT . Phyllosticta adoxae, CO.
R UST . Puccinia adoxae (III), CO, UT, WY;
P. argentata (0, I), IA, MN, WI; II, III on
Impatiens .

A NTHRACNOSE . Glomerella cingulata, TX.
L EAF S POT . Cercospora nandinae, AL, SC.
N EMATODE , Root Knot. Meloidogyne

sp.,

NC, TX.
N ONPARASITIC . Chlorosis. Alkaline soil, TX.
P OWDERY M ILDEW . Microsphaera berberidis
(Erysiphe

Mustard Greens (Brassica juncea)

berberidis), CA, Pacific

Northwest.
R OT , Root. Phymatotrichum omnivorum, TX.
V IRUS . Cucumber Mosaic, MD, GA; Nandina
Mosaic, CA; Nandina Stem Pitting, FL.

B ACTERIAL Black Rot. Xanthomonas

compestris, FL, OH.
B ACTERIAL , MLO. Aster Yellows.
B ACTERIAL , Yellows. Spiroplasma citri, IL.
C LUB R OOT . Plasmodiophora brassicae, CA,
CT, OH, TX, WA.
D AMPING -O FF .

Narcissus (Daffodil, Jonquil)

Rhizoctonia solani,

cosmopolitan.
D OWNY M ILDEW . Peronospora parasitica, CT,
FL, IA, TX.
L EAF S POT . Cercospora brassicicola, IN, LA,
NJ; Cercosporella brassicae, CA, VA;
Alternaria brassicae, CA, black spot;
Pseudocercosporella capsellae, CA, white
spot.
N EMATODE , Root Knot. Meloidogyne sp., FL,
MO, TX; Heterodera schachtii, UT.
P OWDERY M ILDEW . Erysiphe polygoni, AZ, CA,
FL, TX.
R OT , Crown; Drop. Sclerotinia sclerotiorum,
TX.

B ACTERIAL Streak; Stem rot. Unidentified, WA.
B LIGHT , Leaf; Fire. Sclerotinia ( Botrytis )
polyblastis, OR, WA; Botrytis cinerea;
Botryotinia polyblastis, WA.
L EAF S CORCH . Stagonospora curtisii, general,
especially in East and South.
L EAF S POT , Blight; White Mold. Ramularia
vallisumbrosae, OR, WA.
N EMATODE , Bulb. Aphelenchoides fragariae,
FL, GA, NC, SC; A. subtenuis, Pacific
Coast; Aphelenchus avenae, secondary.
N EMATODE , Bulb; Brown-ring Disease; Leaf
“Spikkel”. Ditylenchus dipsaci, in all com-
mercial narcissus areas.