Host Plants - Westcott's Plant Disease - page 567

Mesembryanthemum (Fig-Marigold) Milkwort (Polygala)

N EMATODE ,RootKnot.Meloidogyne sp., AL, TX.
S OOTY M OLD . Torula herbarum, CA.

A NTHRACNOSE . Gloeosporium ramosum, IN, NJ,
WI.
L EAF S POT . Cercospora grisea, MS, NJ, VA;
Septoria consocia, IN, MI; S. polygalae, NY.
R UST . Aecidium renatum, NM; Puccinia
andropogonis var. polygalina (0, I), IA, MI,
WI; II, III on Andropogon ; P. pyrolae (III),
CT, ME, MI, NH, NY, WI.

Mesquite (Prosopis)

B ACTERIAL Crown Gall. Agrobacterium

tumefaciens, TX.
B LIGHT , Leaf. Cercospora prosopidis;
Scleropycnium aureum, AZ, TX.
L EAF S POT . Napicladium prosopodium,TX;
Phyllosticta juliflora, also pod spot, OK, TX;
Gloeosporium leguminum, pod spot, TX.
M ISTLETOE . Phoradendron californicum;
P. serotinum (flavescens), TX to CA, and
P. tomentosum, TX.
P OWDERY M ILDEW . Leveillula taurica; Oidiopsis
taurica; Uncinula prosopodis, TX.
R OT , Heart. Polyporus texanus, CA, TX; Fomes
everhartii, AZ, TX; Schizophyllum com-
mune, TX; Hypoxylon diatrypeoides

Mimosa, Silk-Tree (Albizzia julibrissin)

C ANKER ;D IEBACK . Nectria cinnabarina, DC,
NC, VA.
N EMATODE , Root Knot. Meloidogyne arenaria
var. thamesii; M. incognita; M. javanica;
M. hapla.
N EMATODE ,

Stubby Root. Trichodorus

primitivus.
R OT , Heart.

(die- Ganoderma lucidum; Root,

back, trunk rot), Mexico.
R OT , Root. Phymatotrichum omnivorum, TX.
R UST . Ravenelia arizonica (II, III), TX to CA;
R. holwayi (0, I, II, III), TX to CA.

Armillaria mellea.
V IRUS . Mimosa Striped Chlorosis, AR.
W ILT . Fusarium oxysporum f. sp. perniciosum,
AL, AR, CA, GA, FL, MS, NJ, NC, SC, VA.
The mimosa wilt is one of the most devastat-
ing tree disease on record. The fungus is in the
soil with no possibility of control by aerial
spraying. The incidence of wilting is probably
increased by nematodes. Resistant varieties
Tryon and Charlotte have been released, but
occasional specimens succumb to wilt. The fun-
gus may also be seed-transmitted.

Mignonette (Reseda)

D AMPING -O FF , Root Rot. Rhizoctonia solani, CT.
L EAF S POT . Cercospora resedae, MA to MS, IA,
MO.
N EMATODE , Root Knot. Meloidogyne sp., FL.
W ILT . Verticillium albo-atrum, NY.

Milk Thistle (Silybum)

Mimulus (Monkey-Flower)

V IRUS . Tobacco Streak, CA.

B ACTERIAL , MLO. California Aster Yellows,
CA.
B LIGHT , Gray Mold. Botrytis cinerea, AK.
L EAF S POT . Cercospora mimuli, MO;
Ramularia mimuli, CA, NY, OH, WY;
Septoria mimuli, PA to MS, MO, NE.
N EMATODE , Leaf. Aphelenchoides ritzemabosi.

Mikania (Climbing Hempweed)

L EAF S POT . Cercospora mikaniae, MS; Septoria
mikanii, CT, TX.
R UST . Puccinia spegazzinii, AL, FL, MS, NC.