Host Plants - Westcott's Plant Disease - page 662

C ANKER , Stem Girdle. Hymenochaete B LIGHT , Foliar. Phytophthora tropicalis, VA.

B LIGHT , Gray Mold. Botrytis cinerea, CT, WA.
B LIGHT ,T WIG . Colletotrichum dematium, FL.
C ANKER ;D IEBACK . Phomopsis lirella, CT, MD,
NJ, OH, PA, VA; Phoma sp., OR.
D ODDER . Cuscuta indecora, TX.
F LOWER , Spot and Blight. Choanephora
cucurbitarum, LA.
L EAF S POT . Alternaria sp., PA, TX;
Colletotrichum sp., FL; Macrophoma
vincae, also dieback, IL, NY; Phyllosticta
sp., CT, GA, NJ; P. minor, MD, NJ, NY,
VA; P. vincae-majoris, CA; Septoria vincae,
NJ, NY; Volutella vincae, NY, PA.
M OLD , Leaf. Cladosporium herbarum, ME,
NY, PA.
N EMATODE , Dagger. Xiphinema americanum,WI.
N EMATODE , Root Knot. Meloidogyne sp., CA,
KS, OH.
R OT , Root. Phytophthora cactorum, NC;
P. lateralis, NC.
R OT ,Root,Black.Thielaviopsis basicola,FL.
R OT , Root and Stem. Rhizoctonia solani, IL,
MD, NJ, PA. Phytophthora parasitica, MD.
R UST . Puccinia vincae (0, I, II, III), MA, MI, NY,
WA.
S POT , Target. Corynespora cassiicola, FL.
V IRUS . Cucumber Mosaic, NJ; Potato Yellow
Dwarf, CA; Tomato Spotted Wilt-
Impatiens Serotype, FL, GA.
W ILT . Verticillium albo-atrum, CA, OR.

agglutinans, PA.
D ODDER . Cuscuta compacta, FL.
D OWNY M ILDEW . Plasmopara viburni, general.
G ALL , Stem; Dieback. Phomopsis sp., MD, NJ,
NY.
L EAF S POT . Cercospora opuli, IA, MS; C. tinea,
LA; C. varia, general; Helminthosporium
beaumontii, AL, TX; Hendersonia foliorum
var. viburni, FL, TX; H. tini, LA;
Leptosphaeria tini, LA; Monochaetia
desmazierii, WV; Phyllosticta lantanoides,
NY; P. punctata, FL, IA, WI; P. tinea, MD;
Ramularia viburni, TN, WI.
L EAF S POT . Cristulariella pyramidalis, MD.
L EAF S POT , Algal. Cephaleuros virescens,
FL, LA.
M OLD , Leaf. Cladosporium herbarum, OH, PA.
N EMATODE , Root Knot. Meloidogyne spp., CA,
MD, MS.
P OWDERY M ILDEW . Microsphaera alni, general.
R OT , Root. Clitocybe tabescens, FL; Corticium
falactinum, MD; Phymatotrichum
omnivorum, TX; Rosellinia necatrix, CA;
Phytophthora cinnamomi VA.
R UST . Aecidium rubromaculans (0, I), FL;
Coleosporium viburni (II, III), IL, IA, MD,
MI, VA, WI; 0, I unknown; Puccinia linkii
(III), AK, ID, MI, MT, NH, WA.
S POT A NTHRACNOSE . Sphaceloma viburni, CA,
WA.
W ILT . Verticillium albo-atrum,

IL, IN,

OR, WA.
Viburnum carlesii is extremely sensitive to sulfur
and may be injured even by spray drift from
other plants.

Vincetoxicum (Milkvine)

D OWNY M ILDEW . Plasmopara gonolobi,MDto
FL, TX.
L EAF S POT . Cercospora bellynckii, TX.
R OT , Root. Phymatotrichum omnivorum, TX.
R UST . Puccinia obliqua (III), FL to KY, AZ, OK;
Uromyces asclepiadis (II, III), IN, WV.

Vidalia Sweet Onion (Allium)

D OWNY M ILDEW . Peronospora destructor, GA.
R OT , Bulb. Botrytis tulipae, GA.

Violet (Viola odorata and Native
Species)

Vinca (Periwinkle, Ground-Myrtle)

B ACTERIAL , MLO. Aster Yellows, KS, TX.
B ACTERIAL Stunt. MLO, AR, OK.

A NTHRACNOSE . Colletotrichum violae-tricoloris,
CT, MA, MS, NJ, NY, OH, PA.