Host Plants - Westcott's Plant Disease - page 516

V IRUS . Tobacco Rattle, FL; Tomato Spotted
Wilt-Impatiens Serotype, FL.
W ILT , Fusarium. Fusarium chrysanthemi,
F. oxysporum f. sp. trachapheilum, FL.

Geranium (Cranesbill, Herb-Robert)

B ACTERIAL Leaf Spot. Pseudomonas erodii, FL,
IL, IN, OR, TX; Xanthomonas geranii, NY.
B LIGHT , Leaf Spot; Stem Rot. Botrytis cinerea,
KS, MO.
B ROOMRAPE . Orobanche ramosa, TX.
D OWNY M ILDEW . Plasmopara geranii, NJ to FL,
KS, TX, MA to IA, MT, UT, WI.
G ALL , Leaf. Synchytrium geranii, LA, OK, TX.
L EAF S POT . Cercospora geranii, CO, IA, KS,
MO, MT, NY, TX, UT, WI;
Cylindrosporium geranii, LA;
Dilophospora geranii, WI; Pestalozziella
subsessilis, MS, MO, NJ, WI; Phyllosticta
geranii, LA, TX; Ramularia geranii, CA,
LA, WA, WY; Septoria expansa, KS, TX;
Stigmatea geranii, black leaf speck, MD;
Venturia circinans, mold, AK.
P OWDERY M ILDEW . Erysiphe polygoni, CO, IL,
IN, OH, PA, WV, WI, WY; Sphaerotheca
macularis, CA, ID, MN, MT, NE, PA, WA,
WI, WY.
R OT , Rhizome. Seaverinia geranii, NY, OH, WI.
R OT , Root. Phymatotrichum omnivorum, TX.
R UST . Puccinia leveillei (III), CO, MT, UT, WA,
WY; P. polygoni-amphibii (0, I), CT to WI,
KS, MN, MO, MT, TX; II, III on Polygonum;
Uromyces geranii (0, I, II, III), AK, ME, WY.
V IRUS . Cucumber Mosaic, FL.

Germander (Teucrium)

D OWNY M ILDEW . Peronospora sp., OK.
L EAF S POT . Cercospora teucrii, NY to MS, TX,
WI; Phyllosticta decid-ua, TX, WI.
N EMATODE , Root Knot. Meloidogyne hapla.
P OWDERY M ILDEW . Golovinomyces

cichoracearum, IL, PA, WI.
R UST . Puccinia menthae (0, I, II, III), PA.

Geum (Avens)

B ACTERIAL , MLO. California Aster Yellows,
CA.
D OWNY M ILDEW . Peronospora potentillae, CA,
IL, IN, IA, KS, NE, WI.
G ALL , Leaf. Synchytrium aureum, WI.
L EAF S POT . Cercospora gei, WI;
Cylindrosporium gei, NH, WI; Marssonina
adunca, MT, WA; Phyllosticta sp., WV, WI;
Ramularia gei, MO, WI; Septoria gei, AK,
DE, IL, MI, NE, NY, OH.
N EMATODE , Root Knot. Meloidogyne sp., CA.
P OWDERY M ILDEW . Erysiphe polygoni, AK;
Sphaerotheca macularis, IN, MD, NE, NY,
ND, OH, PA, WA, WI.
R OT , Root. Phymatotrichum omnivorum, TX.
R UST . Puccinia sieversii, CO.
S MUT , Leaf. Urocystis ( Whetzelia ) waldsteiniae,
MT, WA.

Gerbera (Transvaal Daisy)

B LIGHT , Flower; Ray Speck. Alternaria dauci f.
sp. solani, FL.
B LIGHT , Gray Mold. Botrytis cinerea, FL, NY.
L EAF S POT ; Stem Rot. Gloeosporium sp., NY.
N EMATODE , Root Knot. Meloidogyne sp., AL,
CA, MD, NY, NC.
P OWDERY Gilia (Skyrocket) M ILDEW . Golovinomyces

cichoracearum, CA, OK.
R OT , Crown. Sclerotinia sclerotiorum, MD, NY.
R OT , Root and Stem. Phytophthora cryptogea
and P. drechsleri, CA, NJ, NY; Pythium
irregulare, CA.

L EAF S POT . Ramularia giliae, OR.
N EMATODE , Lesion. Pratylenchus pratensis,

TX.
N EMATODE , Root Knot. Meloidogyne sp., CA.