Host Plants - Westcott's Plant Disease - page 517

N EMATODE , Stem. Ditylenchus dipsaci.
P OWDERY M ILDEW .

Ginseng (Panax)

Sphaerotheca macularis,

CA, TX, WA.
R OT , Root. Phymatotrichum omnivorum,TX.
R UST . Puccinia aristidae (0, I), AZ, CO; P. giliae
(II, III), AZ, CA, CO, NE, OR, WA; 0, I,
unknown; P. plumbaria (0, I, III), CA,
CO, NE, UT, WY; P. yosemitana (0, III),
CA, CO; Gymnosporangium exterum
(0, I), IN, KY, MO, NC, TN, VA, III on
red-cedar.

B LIGHT . Alternaria panax, general; Botrytis
cinerea, NY to NC, MI, WA.
D AMPING -O FF . Pythium debaryanum, NY; Rhi-
zoctonia solani, AR, IN, MI, NJ, NY, WA;
Phytophthora citricola, MI.
L EAF S POT . Septoria sp.; S. araliae, WI;
Colletotrichum dematium, secondary, NY
to NC, MN, MO.
N EMATODE , Root Knot. Meloidogyne sp., CT, MI,
NY, OH, PA, WI.
N ONPARASITIC . Papery Leaf. Moisture deficiency,
sunscald, MI, MO, NJ, NY, PA.
P OWDERY M ILDEW . Erysiphe panax.
R OT , Rhizome. Sclerotinia sclerotiorum, white
rot, MI, NY, OH, PA, WA, WI; S. smilacina,
black rot, MI, MN, NY, WI.
R OT , Root. Armillaria mellea,WA;Fusarium
scirpi, NY to AL, MO, WA, WI;
Phytophthora colocasiae, NC; Thielaviopsis
basicola, black root, IL, MI, NJ, NY, OH;
Ramularia spp., MI, NY, OR, WA, WI.
R OT , Stem, Root; Downy Mildew. Phytophthora
cactorum, CT to NC, IA, MI, WA.
R UST . Puccinia araliae (III), MA, PA.
W ILT . Verticillium albo-atrum, IN, KY, MI, NJ,
NY, OH, PA, TN, WI.

Gillenia (American Ipecac, Indian
Physic)

R UST . Gymnosporangium exterum (0, I), IN,
KY, MO, NC, TN, VA, III on red-cedar.

Ginger, Edible (Zingiber)

B ACTERIAL , Rhizome Rot. Enterobacter cloacae,
HI.

Ginger, Wild (Asarum)

G ALL , Leaf. Synchytrium asari, CA, MN, WI.
L EAF

S POT . Ascochyta versicolor, ID;

Plagiostoma ( Laestadia ) asarifolia, SC.
R OT ,Rhizome.Sclerotinia sclerotiorum,NY.
R UST . Puccinia asarina, CA, ID, OR, WA.

Gladiolus

B ACTERIAL Leaf Blight. Xanthomonas
gummisudans, NY to MO, ND, WA.
B ACTERIAL , MLO. Aster Yellows,MD.
B ACTERIAL Scab; Neck Rot; Leaf Spot. Pseudo-
monas marginata, general.
B ACTERIAL Soft Rot. Erwinia carotovora, MI.
B LIGHT , Brown Spot of leaves, flowers.
Curvularia lunata ( Cochliobolus lunata ),
FL, MD, MI, NY, NC, VA, WI.
B LIGHT , Leaf; Flower Spot; Corm Rot. Botrytis
gladiolorum, AK, CA, FL, MA, MD, NJ, NY,
OR, WA, WI.
B LIGHT , Seedling. Botrytis elliptica, WA.
B LIGHT , Southern. Sclerotium rolfsii, FL.

Ginkgo (Maidenhair-Tree)

A NTHRACNOSE . Glomerella cingulata, MD, TX.
B ACTERIAL LEAF S POT , Canker Stem. Pseudomo-
nas syringae pv. syringae, CA.
L EAF S POT . Phyllosticta ginkgo, PA; Epicoccum
purpurascens, IL.
N EMATODE , Root Knot. Meloidogyne sp., MS.
R OT ,Root.Phymatotrichum omnivorum,TX.
R OT , Sapwood. Polyporus hirsutus; P. lacteus;
P. tulipiferae; P. versicolor; Fomes

connatus, MD.
R OT , Seed. Xylaria longeana, PA.