Biology Reference
In-Depth Information
long run. Unless aphids are controlled, the virus
will spread from variegated to solid-color
plantings in the garden.
sometimes turn yellow and drop prematurely.
Leaf spots are seldom serious enough for
treatment.
Tulip-Tree, Yellow Poplar
(Liriodendron)
Tung Tree (Aleurites)
A
NTHRACNOSE
. Glomerella cingulata, FL.
B
LIGHT
, Southern. Sclerotium rolfsii, TX.
B
LIGHT
, Thread. Pellicularia koleroga, FL, LA,
MS, TX; Web, P. filamentosa, LA, MS.
C
ANKER
;D
IEBACK
; Nut Rot. Botryosphaeria
ribis, GA, LA; Physalospora rhodina, FL,
LA, MS, TX.
C
ANKER
, Felt Fungus. Septobasidium pseudope-
dicellatum, LA.
L
EAF
S
POT
. Cercospora websteri, MS;
Gloeosporium aleuriticum, MS;
Phyllosticta sp., FL, GA, Cristulariella
pyramidalis, FL.
L
EAF
S
POT
, Angular. Mycosphaerella
(
Cercospora
) aleuritidis, MS.
N
EMATODE
, Root Knot. Meloidogyne sp., AL, FL,
MS.
N
ONPARASITIC
. Chlorosis. Copper or potassium
deficiency, FL.
Frenching. Manganese deficiency, FL.
Bronzing. Zinc deficiency, FL.
Wetwood. Alcoholic slime flux. Perhaps bacte-
rial in part.
White Seed. Genetic abnormality.
R
OT
, Root, Collar. Clitocybe tabescens, serious
throughout tung belt; Cephalosporium sp.,
LA; secondary; Phytophthora cinnamomi,
LA.
R
OT
, Root; Collar Rot. Cylindrocladium
scoparium, C. crotalariae, C. floridanum,
MS.
Spraying is usually necessary for thread blight
and nut rot.
B
ACTERIAL
Root Lesion. Pseudomonas sp., OR.
B
LIGHT
, Seedling. Rhizoctonia solani, OH, VA.
C
ANKER
. Dothiorella sp., PA; Myxosporium
spp., NY; Nectria sp., WV to NC, TN; Fusar-
ium solani, SC.
L
EAF
S
POT
. Cylindrosporium cercosporioides,
MD, WV; Gloeosporium liriodendri,CTto
NJ, TX; Mycosphaerella liriodendri, GA,
MI; M. tulipiferae, Middle Atlantic and Gulf
states; Phyllosticta lirodendrica (conidial
stage of
Mycosphaerella
), widespread;
Ramularia liriodendri, AL, DE.
L
EAF
S
POT
, Tar, Black. Ectostroma liriodendri,
widespread; Rhytisma liriodendri, CA, TX,
VA.
N
EMATODE
, Lesion. Pratylenchus pratensis, TX.
P
OWDERY
M
ILDEW
. Phyllactinia corylea,NYto
AL, MO; Erysiphe polygoni, widespread.
R
OT
, Heart. Collybia velutipes, WV;
Ganoderma applanatum, occasional.
R
OT
,
Root.
Armillaria mellea,
VA;
Phymatotrichum
omnivorum,
TX;
Cylindrocladium liriodendri, CA.
R
OT
, Sapwood; Wood. Daedalea extensa and D.
unicolor, sometimes on standing trees;
Daldinia vernicosa, cosmopolitan;
Polyporus spp.; Schizophyllum commune,
wound rot; also many stain and timber rots.
R
OT
,
Seedling
Collar.
Cylindrocladium
scoparium, NJ, NC, TN.
S
OOTY
M
OLD
.
Capnodium elongatum,
cosmopolitan.
V
IRUS
. Chlorotic Ringspot and Vein Banding,
NC, SC.
The most conspicuous fungus on ornamental
tulip-trees is the black sooty mold growing
in copious honeydew secreted by tulip-tree
aphids and scales. In hot, dry weather leaves
Tupelo, Sour Gum, Black Gum (Nyssa)
A
NTHRACNOSE
. Colletotrichum acutatum, GA.
B
LIGHT
, Thread. Pellicularia koleroga, LA.
