Host Plants - Westcott's Plant Disease - page 568

P OWDERY M ILDEW . Golovinomyces
cichoracearum, CA, PA, UT.
R UST . Puccinia andropogonis (0, I), MO, WI; II,
III on Andropogon ; Uredo sp. (II), WI.

Mistletoe (Phoradendron)

B LACK M ILDEW . Asterina phoradendricola, FL.
B LIGHT , Brown Felt. Herpotrichia juniperi, CA.
B LIGHT , Leaf. Sphaeropsis visci, SC, TX;
Phyllosticta phorodendri, CA.
B LIGHT , Twig. Nectria cinnabarina, TX.
C ANKER . Cystospora pinicola, OR, WA;
Hymenochaete agglutinans, AL.
C ANKER , Felt Fungus. Septobasidium pseudope-
dicellatum, FL.
D ODDER . Cuscuta exaltata, TX.
L EAF S POT . Cercospora

Mint (Mentha)

A NTHRACNOSE . Colletotrichum coccodes,WA,WI.
C ANKER , Stem. Fusarium sp., MI, WA;
Alternaria sp., MI; Phoma menthae, OR.
L EAF S POT . Cercospora menthicola, IL, TX;
Phyllosticta decidua, occasional, ME to OH,
IA, WI; Ramularia menthicola, CA, ME,
MT, OR; Septoria menthae ( S. menthicola ),
IN, WI.
N EMATODE . Aphelenchoides parietinus;
Paralongidorus sylphus, OR; Paratylenchus
macrophallus, OR.
N EMATODE , Root Knot. Meloidogyne hapla, OR.
P OWDERY M ILDEW . Golovinomyces
cichoracearum, CO, IA, UT, WA; Erysphie
galeopsidis,

struthanthi, FL;

Exosporium phoradendri, TX;

Phytophthora ramorum, CA.
R UST . Peridermium bethelii, CO; Uredo

phoradendri, CA, OR.
If you treasure mistletoe for Christmas greens,
you will be sorry it has diseases; but if you con-
sider mistletoe a pest, you'll wish the above list
were longer.

IA; Erysphie orontii, CA;

Erysiphe polygoni, TX; Sphaerotheca

macularis,WA.
R UST . Puccinia menthae (0, I, II, III), East and
central states to TX and Pacific Coast, FL;
P. angustata (0, I), CA, SD,WI; II, III on grasses.
S POT A NTHRACNOSE . Sphaceloma menthae, IN,
MD, MI.
V IRUS . Tobacco Ring Spot, IN, OR; Tomato
Spotted Wilt, OR; Strawberry Latent
Ringspot, OR; Mint Crinkle; Alfalfa
Mosaic; Mint Vein Bending, Arabis
Mosaic, Mint Virus (1), (2), and (X), Cherry
Raspberry Leaf, Peppermint Latent,
Cucumber Mosaic, Peppermint Stunt,
Impatiens Necrotic Spot, Lychnis Ringspot,
Tomato Aspermy, OR.
W ILT . Verticillium albo-atrum f. sp. menthae
( V. dahliae ), IN, MI, OR.
Rust is serious in mints grown commercially,
in greenhouses or in the field. Overwintering
spores can be killed by treating rhizomes with
hot water. Spot anthracnose is largely controlled
by thorough coverage when mint is plowed under
in the fall. Mint in the backyard is too prolific for
worry about disease.

Mistletoe, Dwarf (Arceuthobium spp.)

B LIGHT , Brown Felt. Herpotrichia juniperi, CA.
R UST . Peridermium bethelii, CO.
S POT , HOOT , ESION . Colletotrichum

gloeosporioides.

Mock-Cucumber (Echinocystis)

A NTHRACNOSE . Colletotrichum lagenarium, FL.
D OWNY M ILDEW . Plasmopara australis, IA, KS,
MN, OH, WI; Pseudoperonospora cubensis,
OH.
L EAF S POT . Cercospora echinocystis, NY to FL,
NE, WI; also fruit spot; Septoria spp., wide-
spread; Alternaria sp., FL.
P OWDERY M ILDEW . Golovinomyces

cichoracearum, WI.
V IRUS . Beet Curly Top, CA; Cucumber Mosaic,
CA, CO, IL, IN, MI, NY, WI.
W ILT . Fusarium sp., FL.