Host Plants - Westcott's Plant Disease - page 560

Phyllosticta spp., AL, CT, WA;

Mallotus

Cylindrocladium sp., FL, GA.
N EMATODE , Root Knot. Meloidogyne sp.
N ONPARASITIC . Scald. In eastern states winter
injury to foliage is severe.
P ARASITIC

L EAF S POT . Cercospora malloti, MS.

L ICHEN . Strigula elegans and

Mallow, Garden (Malva) S. complanata, Southern U.S., LA.

R OT , Root. Phymatotrichum omnivorum, TX.
R UST . Cumminsiella mirabilissima (0, I, II, III),
common Western Great Plains to
Pacific Coast; C. texana, TX; C. wootoniana
(II, III), AZ, NM; Puccinia graminis (0, I),
CA, MI, ND; II, III on cereals and grasses;
P. koeleriae (0, I), CO, ID, MT, OR; II, III
on Koeleria ; P. oxalidis (0, I), NM; II, III on
Oxalis .
Rust due to Cumminsiella is usually incon-
spicuous, but in a wet season there is a general
blighted effect. Mahonia , like barberry, is under
wheat-rust

B ACTERIAL , MLO. California Aster Yellows,
CA; Beet Curly Top, CA.
L EAF S POT . Alternaria sp.
R OT , Root. Macrophomina phaseoli,CAon
Malva parviflora ; Phymatotrichum

omnivorum, TX.
R UST . Puccinia heterospora (III), KS, TX;
P. malvacearum, CA, CO, OR, WV.
V IRUS . Malva Vein Clearing, CA.

Malvastrum (False-Mallow, Bush-
Mallow)

quarantine. Mahonia

repens

is

immune.

R OT , Root. Phymatotrichum omnivorum, TX.
R UST . Puccinia interveniens (0, I), CA; III on
Stipa ; P. malvacearum; P. schedonnardi
(0, I), MT, ND to NM; II, III on wild grasses;
P. sherardiana (0, III), MT, ND to TX, NM;
P. heterospora (III), TX.
V IRUS .

Maianthemum

B LIGHT . Botrytis sp., NY.
L EAF S POT . Ramularia rubicunda, MI, NY, OH,
PA, WI, CA to AK; Sphaeropsis cruenta,
AK, WA.
R UST . Puccinia sessilis (0, I), MA, MI, MN, NY,
PA, WI; II, III on Phalaris ; Uromyces
acuminatus var. magnatus (0, I), MI, NY,
WI; II, III on marsh grass.

Begomoviruses (especially in

Malvaceous weed species), Yucatan

Peninsula.

Malvaviscus

B LIGHT , Twig. Sclerotinia sclerotiorum, TX.
L EAF S POT . Phyllosticta malvavisci, TX.
R OT ,

Malachra

Root. Clitocybe tabescens, FL;

Helicobasidium purpureum, TX;

L EAF S POT . Cercospora malachrae, TX. Phymatotrichum omnivorum, TX.

R UST . Kuehneola malvicola (II, III), TX;

Puccinia heterospora (III), TX.

Malacothrix

Mandevilla (Mandevilla splendens)

G ALL , Leaf. Synchytrium innominatum, CA.
R UST . Puccinia harknessii (III), CA; P. hieracii
(0, I, II, III), CA.

B ACTERIAL Wilt. Ralstonia solanacerum, IN, MI,
MN, OH.