Host Plants - Westcott's Plant Disease - page 449

betulae DE, NY, WI; Phyllosticta
betulinum; Septoria betulicola; S. betulae.
M ISTLETOE . Phoradendron serotinum
(flavescens), FL, IN, TX; Viscum album,
CA, on Betula verrucosa (Weeping White
Birch).
P OWDERY M ILDEW . Microsphaera alni, MA, NH,
PA; Phyllactinia corylea, widespread.
R OT , Heart. Fomes spp.; Stereum purpureum;
Polyporus hispidus.
R OT , Root. Armillaria mellea; Phytophthora
cinnamomi, of seedlings; Phymatotrichum
omnivorum, TX.
R OT , Sapwood. Polyporus betulinus, general on
gray

Bidens (Bur-Marigold)

B ACTERIAL , MLO. Aster Yellows, CA.
P OWDERY M ILDEW . Sphaerotheca macularis,
general.
R UST . Uromyces bidenticola (0, I, II, III), CA,
FL, NM.
V IRUS . Bidens Mottle, FL.

Bignonia (Crossvine)

B LACK M ILDEW . Asterina bignoniae,LA;Meliola
bidentata,Gulfstates;M. furcata,FL.
L EAF S POT . Cercospora capreolata, AL, MS;
Leptostromella bignoniae, TN.
N EMATODE , Root Knot. Meloidogyne sp.
S OOTY M OLD .

and paper birches; P. gilvus;

Steccherinum spp.
R OT , Wood. Polyporus spp., Stereum spp.;
Daedalea unicolor and other spp.
R OT , Wound. Schizophyllum commune;
Pleurotus serotinus.
R UST . Melampsoridium betulinum (II, III); 0,
I on larch.
V IRUS . Dieback, vein clearing, New England.

Capnodium elongatum,

AL, MS.
S POT A NTHRACNOSE . Sphaceloma sp., LA.

Bindweed, Field (Convolvulus)

Bird-of-Paradise (Strelitzia)

P OWDERY M ILDEW . Erysiphe convolvuli var. con-
volvuli, General, N. America.

B ACTERIAL Leaf Spot; Blight. Xanthomonas

campestris, FL.
B ACTERIAL Leaf Stripe. Acidovorax avenae
subsp. avenae, FL.
B LIGHT . Cylindrocladium clavatum, FL.

Birch (Betula)

A NTHRACNOSE . Gloeosporium sp.; Glomerella
cingulata, VA, on Eur. White Birch.
C ANKER , Bark Patch. Aleurodiscus oakesii, VT;
Solenia ochracea, cosmopolitan.
C ANKER , Bleeding, Phytophthora cactorum, NJ.
C ANKER , Trunk. Hymenochaete agglutinans,
MI, PA; Nectria coccinea; N. galligena;
Twig Canker, N. cinnabarina.
D IEBACK . Melanconis stilbostoma,MAtoINon
white birch; other species; Cylindrosporium
orthosporum.
L EAF B LISTER . Taphrina americana, Witches'
Broom, NH, VT, WI; T. carnea, ME, NH;
T. flava, ME, MA, NH, WI.
L EAF S POT . Gloesporium betularum;
G. betulaeluteae, NY, PA; Cylindrosporium

Bischofia

L EAF S POT , Algal. Cephaleuros virescens, FL.

Bishops-Cap (Mitella)

L EAF S POT . Cercospora mitellae, MI;
Phyllosticta mitellae, NY, WI; Ramularia
mitellae, IL, IN, MI, NY: Septoria mitellae,
MI, WI.
P OWDERY M ILDEW . Sphaerotheca macularis, WI.
R OT , Leaf. Sclerotium deciduum, WI.
R UST . Puccinia heucherae (III), widespread.