Biology Reference
In-Depth Information
causing witches' broom, widespread, espe-
cially in central states; Uncinula
macrospora, FL, GA; U. parvula, wide-
spread; U. polychaeta, in South.
R OT , Root. Armillaria mellea, occasional;
Helicobasidium purpureum, seedling blight,
TX; Phymatotrichum omnivorum, TX;
Poria ambigua, TX.
R OT , Wood. Daedalea spp.; Fomes
Hardy Orange (Poncirus)
A NTHRACNOSE ;D IEBACK . Glomerella cingulata,
Gulf states.
C ANKER ;D IEBACK . Diaporthe citri, melanose,
Gulf states; Diplodianatalensis, gummosis,
general.
R OT , Root. Phymatotrichum omnivorum, TX;
Xylaria polymorpha, LA.
S POT A NTHRACNOSE ; Citrus
spp.;
Ganoderma
lucidum; Polyporus
spp.;
Stereum bicolor, cosmopolitan.
V IRUS . Island Chlorosis, IL; Hackberry Leaf
Mosaic; Angular Yellow Leaf Spot, MN.
Hackberry witches' broom, so prominent in
a winter landscape, are caused by gall mites in
association with powdery mildew. There is no
real control, except to cut off unsightly branches.
Chinese hackberry and southern hackberry are
less susceptible.
Scab. Elsino¨
fawcettii, MS.
Hares-Tail (Lagurus)
R UST .
Puccinia coronata
(II,
III), crown;
P. graminis, stem, WA.
Hawkbit, Fall Dandelion (Leontodon)
Halesia (Silver-Bell, Snowdrop-Tree)
B ACTERIAL , MLO. Aster Yellows, ME, NY.
R UST , Puccinia hieracii (0, I, II, III), ME, NH.
L EAF S POT . Cercospora halesiae, ;
Cristulariella moricola, Zonate Leaf Spot, LA.
R OT , Wood. Polyporus halesiae, GA.
Other fungi are reported on twigs and
branches but not as causing specific diseases.
Hawksbeard (Crepis)
L EAF
S POT . Cercospora
stromatis, CO;
Phyllosticta
eximia,
CO; Ramularia
crepidis,NM.
P OWDERY
M ILDEW .
Golovinomyces
Hamelia (Scarlet-Bush)
cichoracearum, NE, PA;
Sphaerotheca
macularis,WY.
R UST . Puccinia crepidis-montanae (0, I,
II, III), CO, ID, MT, OR, UT, WA,
WY; P. hieracii, ND to CO, WA; II, III on
Carex .
R OT , Root. Clitocybe tabescens, FL.
R UST . Uredo hameliae, FL.
Harbinger-Of-Spring (Erigenia)
Hawkweed (Hieracium)
R UST . Puccinia erigeniae (0, I, III), OH.
B LIGHT , Stem. Phoma hieracii, TX.
D OWNY M ILDEW . Bremia lactucae, WI.
L EAF S POT . Cercospora hieracii, AL,
NC; Phyllosticta decidua, WI;
Septoria cercosperma, TX; S. hieracicola,
NY.
Hardenbergia
N EMATODE , Root Knot. Meloidogyne sp.
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