Biology Reference
In-Depth Information
B LIGHT , Cane. Physalospora obtusa, CT, to AL,
KS, TX; Gloeosporium spp., widespread.
B LIGHT , Southern. Sclerotium rolfsii, FL,
KS, TX.
B LIGHT , Thread. Pellicularia koleroga, FL, LA.
C ANKER , Brand. Coniothyrium wernsdorffiae,
MN, NY, PA (also reported from CO, IN,
MS, TX, but probably mistaken for C.
fuckelii ).
C ANKER , Brown. Cryptosporella umbrina,MA
to FL, CA, ID, MI, NE, TX.
C ANKER , Common, Graft. Leptosphaeria
coniothyrium ( Coniothyrium fuckelii ), gen-
eral; Graft, C. rosarum, CA, IA, MA, MN,
NJ, PA, TX.
C ANKER , Crown. Cylindrocladium scoparium,
in greenhouses, MA to GA, IL, TX.
C ANKER ;D IEBACK . Botryosphaeria ribis var.
chromogena, AL, MD, TX, VA;
Cryptosporium minimum, OR, PA;
Diplodia spp., probably secondary;
Griphosphaeria corticola ( Coryneum
microstictum ), NH to AL, ND; Pacific North-
west; Nectria cinnabarina, coral spot, MA to
VA, AK, WA; Cytospora sp., KY, PA, VA,
WA; Didymella sepincoliformis, MD;
Glomerella cingulata, MD, NJ, VA;
Macrophoma sp., TX, VA; Botryodiplodia
theobromae, MN; Trichothecium roseum,
MN.
D ODDER . Cuscuta indecora and C. paradoxa,
FL, TX.
D OWNY M ILDEW . Peronospora sparsa, mostly
under glass, ME to FL, CA, IA; reported out-
doors in DE.
F OLIAR
M OLD , Black, of Grafts. Chalaropsis
thielavioides, CA, IL, NY, PA on understock
from OR and WA.
M OLD , Leaf and Bud. Cladosporium sp. and
C. fuscum, AK, CA, MD, MN, MS, OK, TX.
N EMATODE , Dagger. Xiphinema
diversicaudatum, greenhouses in Northeast;
X. americanum; X. krugi.
N EMATODE , Leaf. Aphelenchoides spp.; Lance,
Hoplolaimus sp.
N EMATODE , Lesion. Pratylenchus pratensis;
P. scribneri; P. vulnus.
N EMATODE , Ring.
Criconemoides
sp.; Pin,
Paratylenchus spp.
N EMATODE , Root Knot.
Meloidogyne
sp.;
M. hapla.
N EMATODE , Spiral. Helicotylenchus spp.; Sheath,
Hemicycliophora spp.
N EMATODE , Sting. Belonolaimus gracilis; Stubby
Root, Trichodorus spp.
N EMATODE , Stylet. Tylenchorhynchus spp.
N ONPARASITIC .
Boron Deficiency.
Leaves
distorted, greenhouse.
Chlorosis. Iron deficiency, upper leaves yellow,
with green veins; nitrogen deficiency, lower
leaves pale; potassium deficiency,
leaves
grayish, may drop, stems weak.
Leaf Scorch. Marginal, potash deficiency. In
greenhouses scorch may be boron and calcium
deficiency.
Mercury Toxicity. In greenhouses when paint
containing mercury used on sash.
Pedicel Necrosis. Collapse of flower stem, cause
unknown.
Weed-killer Injury. Leaves fernlike,
twisted
L ESIONS ,
Black.
Xanthomonas
when 2,4-D used in vicinity.
P ETAL S POT .
perforans, FL.
L EAF S POT . Alternaria sp., VA to AL, TX;
A. brassicae var. microspora, TX;
Cercospora puderi, FL, GA;
Mycosphaerella rosicola ( Cercospora
rosicola ), general; M. rosigena, doubtfully
distinct from M. rosicola , reported from
South; Monochaetia compta, AK, IA, KS,
MD; Pezizella oenotherae, also cane spot,
NJ to FL, MI, TX; Phyllosticta rosae,NYto
FL, IN; P. rosae-setigerae, IN; Septoria
rosae, MS, NJ, SC.
Bipolaris
( Helminthosporium )
setariae, FL.
P OWDERY M ILDEW . Podosphaera pannosa,
general; S. macularis, not readily distin-
guished from S. pannosa ; Phyllactinia
corylea, WA.
R OT ,Dry.Fusarium oxysporum, Brazil.
R OT , Root. Armillaria mellea, CA, MS, OR, TX,
WA; Clitocybe tabescens, FL; Fusarium
spp., occasional, especially in the South;
Phymatotrichum omnivorum, AZ, TX;
Ramularia macrospora,MD.
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