Host Plants - Westcott's Plant Disease - page 465

N EMATODE , Root Knot. Meloidogyne sp., P ETAL S POT . Bipolaris ( Helminthosporium )

CA, FL.
R OT , Root. Phymatotrichum omnivorum, TX.

setariae, FL.
P OWDERY M ILDEW . Oidium sp., FL, NC;
O. dianthi, CA.
R OT , Bud. Fusarium tricinctum f. sp. poae,MA
to VA, KS, NE, WA.
R OT , Root. Phymatotrichum omnivorum, TX;
Pythium sp., IL; Rhizoctonia solani, general;
Armillaria mellea, CA.
R OT , Stem. Armillaria mellea, CA; Fusarium
cerealis, general.
R UST . Uromyces dianthi (II, III), general.
S MUT . Anther. Ustilago violaceae,MA.
V IRUS . Carnation Latent; Carnation Mosaic;
Carnation Mottle; Carnation Ring Spot;
Carnation Streak; Carnation Yellows; Car-
nation Etch-Ring; Beet Curly Top, CA, TX;
Carnation Necrotic Fleck,CA;Carnation
Italian Ring Spot; Carnation Vein Mottle;
Carnation Yellow Fleck and Necrotic
Fleck,OR.
W ILT . Fusarium oxysporum f. sp. dianthi;
Verticillium albo-atrum ( dahliae ), NJ;
Phialophora ( Verticillium ) cinerescens, NY.
A rigid sanitation program is necessary
for healthy carnations, taking cuttings high
on the plant, breaking instead of cutting,
planting in sterile medium, controlling
aphids and other insect vectors of virus diseases
and controlling mites that spread bud rot. The
mother block system controls wilts; heat cures
viruses.

Carissa (Natal-Plum)

C ANKERS ;G ALL . Sphaeropsis tumefaciens, FL.

Carnation (Dianthus caryophyllus)

A NTHRACNOSE . Colletotrichum sp., NJ, NY, TX.
B ACTERIAL Blight. Pseudomonas woodsii, HI.
B ACTERIAL Crown Gall. Agrobacterium

tumefaciens,MD.
B ACTERIAL Fasciation; Witches' Broom.

Clavibacter fascians, CA, OH.
B ACTERIAL , MLO. Aster Yellows.
B ACTERIAL Pimple. Xanthomonas oryzae.
B ACTERIAL Spot. Pseudomonas woodsii,MSto
GA, IN, MI, ND, OK, OR, WA.
B ACTERIAL Wilt. Pseudomonas caryophylli, IL,
IN, IA, MA, MO, WA.
B LIGHT , Branch and Collar Rot. Alternaria
dianthi, general.
B LIGHT , Gray Mold. Botrytis cinerea, cosmopol-
itan in high humidity.
B LIGHT , Petal. Stemphylium floridanum, FL.
B LIGHT , Southern. Sclerotium rolfsii, FL,
MS, TX.
B LIGHT , Web. Pellicularia koleroga, NC.
B LOTCH ,Greasy.Zygophiala jamaicensis,CA,PA.
D OWNY M ILDEW . Peronospora dianthicola, CA.
L EAF S POT , Mold; Fairy Ring. Heterosporium
echinulatum occasional in greenhouses, CA,
TX; Cladosporium herbarum, secondary,
general.
L EAF S POT . Cladosporium echinulatum, HI;
Septoria dianthae, VT to SC, CA, MI, TX.
N EMATODE , Cyst. Heterodera trifolii.
N EMATODE , Lance. Hoplolaimus coronatus.
N EMATODE , Pin. Paratylenchus dianthus.
N EMATODE , Ring. Criconemoides curvatum.
N EMATODE , Root Knot. Meloidogyne arenaria;
M. hapla; M. incognita acrita; M. javanica.
N ONPARASITIC . Yellow Spotting. Potassium defi-
ciency, NJ, NY.

Carob, St. Johns Bread (Ceratonia)

C ANKER . Botryosphaeria ribis, CA.
N EMATODE , Root Knot. Meloidogyne spp.
R OT , Root. Phymatotrichum omnivorum, TX;
Phytophthora cactorum, CA.
W ILT . Verticillium albo-atrum, CA.

Carolina Geranium (Geranium
carolinianum)

B LIGHT , Stem and Leaf. Sclerotinia minor, NC.
V IRUS . Tomato Spotted Wilt, GA.