Host Plants - Westcott's Plant Disease - page 653

B LIGHT , Foliar. Rhizoctonia solani, NC.
B LIGHT , Gray Mold/Stem Canker.

M. incognita; M. javanica; M. chitwoodi,
Pacific Northwest; M. floridensis, FL.
N EMATODE , Spiral. Helicotylenchus nannus.
N ONPARASITIC . Blossom-End Rot. Unbalanced
moisture and calcium deficiency, general.
Blotchy Ripening. Malnutrition, potassium
deficiency.
Catface. Fruit

Botrytis

cinerea, CA, Mexico.
B LIGHT , Late; Fruit Rot. Phytophthora infestans,
general in humid regions and seasons, espe-
cially East and Southeast, AK.
B LIGHT , Southern. Sclerotium rolfsii,VAtoFL
and TX, CA, occasional in North.
B ROOMRAPE . Orobanche ludoviciana, WY;
O. racemosa, CA, NJ, NY.
C ANKER , Stem. Helminthosporium sp., TX;
Myrothecium roridum, also fruit rot, OH,
TX, VA, WI.
D AMPING -O FF . Rhizoctonia solani, also collar rot,
stem canker, cosmopolitan;

abnormalities from growth

disturbances.
Cloudy Spot. Feeding punctures of plant bugs.
Cuticle Crack. Of green fruit; high soil moisture
and air temperature.
Fasciation. Genetic abnormality. Unbalanced
nutrition.
Leafroll. Excessive soil moisture with starch
congestion in leaves.
Oedema. Leaf hypertrophy from excessive water
absorption and reduced transpiration.
Pockets; Puffing. Fruit defect from factors
adversely affecting pollination and growth.
Psyllid Yellows. Toxemia from psyllid feeding,
western states; Candidatus Liberibacter
psyllaurous, AZ, CO.
Russeting. Mite injury.
Sunscald. Fruit injury in heat on plants defoliated
by disease.
Walnut Wilt. Toxemia from root excretions of
walnut trees.
P HYTOPLASMA , Citrus Huanglongbing.
Candidatus Liberibacter asiaticus, FL.
P HYTOPLASMA , Leaf Cup Stunt. Candidatus
Liberibacter solanacearum, New Zealand.
P HYTOPLASMA , Little Leaf. Phytoplasma asteris,
Mexico.
P HYTOPLASMA , Yellowing Disease. Candidatus
Liberibacter solanacearum, TX, Central
America, Mexico, Baja, CA.
P OWDERY M ILDEW . Erysiphe polygoni, on seed-
lings indoors, NC; Erysiphe sp., CT, FL, NJ,
NY, Canada; Leveillula taurica, AZ, CA,
UT; Oidiopsis taurica, CA; Oidium sp.,
CA; O. neolycopersici, FL, MI, Mexico.
R OT , Black Root. Thielaviopsis basicola, CA.
R OT , Brown, Root. Pyrenochaeta lycopersici,
MA.
R OT , Buckeye; Stem Rot. Phytophthora
parasitica, MA to FL, AZ, CA, IL, TX;

Pythium spp.,

cosmopolitan.
D ODDER . Cuscuta spp., CA, ID, MD, NY, TX.
D OWNY M ILDEW . Peronospora tabacina, GA,
NC, SC.
F RUIT S POT . Pullularia pullulans, WV.
L EAF S POT . Ascochyta lycopersici, DE, FL, NJ,
NC, OR, VA, WI; Septoria lycopersici,
general except Northwest; Phyllosticta
hortorum, NY; Cercospora spp.;
Stemphylium solani, gray leaf spot, FL, GA,
IN, LA, NJ, NC, SC, TN, TX, VA;
S. floridanum; Cladosporium oxysporum,
NY; Cristulariella moricola, NY.
L EAF S POT , Target, fruit necrotic pit, freckles.
Corynespora cassiicola, FL.
M OLD , Blue. Penicillium oxalicum, Mexico.
M OLD , Leaf. Botryosporium pulchrum, PA,
TX; Chaetomium bostrychodes, TX;
Cladosporium fulvum, general under glass,
occasional outdoors, IA.
N EMATODE , Awl. Dolichodorus heterocephalus.
N EMATODE , Dagger. Xiphinema americanum.
N EMATODE , Golden. Heterodera rostochiensis
( Globodera rostochiensis ); tobacco cyst,
H. tabacum; soybean cyst, H. glycines, IA,
MN, OH.
N EMATODE , Lance. Hoplolaimus coronatus.
N EMATODE , Lesion. Pratylenchus pratensis,
MD, NJ.
N EMATODE ,Reniform.Rotylenchulus reniformis.
N EMATODE , Root Knot. Meloidogyne arenaria
var. thamesi; M. hapla, Pacific Northwest;