Biology Reference
In-Depth Information
raspberries; if infected plants are found, rasp-
berries should not be replanted in the same
soil for several years.
Red-Bay, Swamp-Bay (Persea
borbonia)
B LACK M ILDEW . Asterina delitescens,VAto
FL, TX; Irenopsis martiniana, AL, MS,
TX; Lembosia rugispora, MS, NC; Meliola
amphitricha, FL, MS; Englerula carnea, FL.
L EAF S POT . Cercospora purpurea,GAto
FL, MS; Phyllosticta micropuncta,MDto
FL, TX; Pestalotia spp., general.
L EAF S POT , Algal. Cephaleuros virescens, Gulf
states.
R OT ,Wood.Polyporus hirsutus; P. mutabilis.
W ILT ,
Ratibida (Prairie Coneflower)
D OWNY M ILDEW . Plasmopara halstedii,IA.
L EAF S POT . Cercospora ratibida, KS, WI;
Physalospora lepachydis, MT; Ramularia
rudbeckiae,
ID; Septoria infuscata, MI,
MO, WI.
P OWDERY
M ILDEW .
Golovinomyces
cichoracearum, ND, TX.
R OT , Violet Root. Helicobasidium purpureum,
TX; Phymatotrichum omnivorum, TX.
R UST . Uromyces perigynius (0, I), ND, TX; II,
III on Carex .
S MUT , White. Entyloma compositarum, NE, MI
to IN, KS, MN.
Laurel.
Raffaelea
albidum, MS;
R. lauricola,MS.
Redweed (Melochia)
C ANKER , Stem. Diaporthe phaseolorum var.
caulivora, LA.
Rattan Vine (Berchemia)
Rhexia (Deergrass, Meadow-Beauty)
R UST . Puccinia coronata (0, I), VA to LA; II, III
on oats and wild grasses.
L EAF S POT . Cercospora erythrogena, AL DE,
MS, TN; Colletotrichum rhexiae, DE;
Phyllosticta rhexiae, FL.
Redbud, Judas-Tree (Cercis)
C ANKER ;D IEBACK . Botryosphaeria ribis var.
chromogena, DE, MD, NJ, NC, TX, VA.
D ODDER . Cuscuta exaltata, TX.
D OWNY M ILDEW . Plasmopara cercidis, TN.
L EAF S POT . Cercospora cercidis, OK;
Cercosporella chionea,IL,IN,KS,NC;
Mycosphaerella cercidicola, general;
Phyllosticta cercidicola,IN,WV;Pestalotia
guepini,IL.
R OT , Root. Phymatotrichum omnivorum, TX;
Polyporus lucidus, VA.
R OT , Wood. Polyporus adustus; P. versicolor;
Ganoderma lucidum ( Polyporus lucidus ).
V IRUS . Yellow Ringspot, OR.
W ILT . Verticillium sp., OH; of seedlings;
V. albo-atrum, DC, VA; V. dahliae, DC;
Cylindrocladium sp.
Rhodesgrass (Chloris gayana)
L EAF S TRIPE , Culm Stripe. Helminthosporium
hawaiiense, FL.
Rhododendron
B ACTERIAL
Crown
Gall.
Agrobacterium
tumefaciens, OH.
B ACTERIAL
Leaf
Spot.
Pseudomonas
cichorii, GA.
B LIGHT . Phytophthora ramorum, CA, NC, OR,
WA; P. tropicalis, VA.
B LIGHT , Bud, Twig. Briosia azalea, GA, NJ, NY,
NC, PA, TN, VA.
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