Biology Reference
In-Depth Information
R OT , Root. Armillaria mellea, CA; Rhizoctonia
solani, CA.
V IRUS . Dasheen Mosaic; Tomato Spotted Wilt,
CA, IL, IN, MD, NY, OR, TX, WA; Calla
Chlorotic Spot, U.S.
Root and rhizome rots are controlled by
treating rhizomes before planting and growing
in pots rather than benches. Specimens showing
spotted wilt must be destroyed before thrips
spread the virus.
Camellia
B ACTERIAL
Crown
Gall.
Agrobacterium
tumefaciens,WA.
B LACK M ILDEW . Meliola camelliae.
B LIGHT . Phytophthora ramorum, CA, OR, WA.
B LIGHT , Flower. Sclerotinia camelliae,
CA, GA, LA, MS, NC, SC, TX, VA;
S.
sclerotiorum, NC; Pestalotia
sp.,
Penicillium sp., AL.
B LIGHT , Gray Mold; Bud and Flower. Botrytis
cinerea, general after frost.
B LIGHT , Petal. Pestalotia sp., AL.
C ANKER ;D IEBACK . Glomerella cingulata, wide-
spread;
Calla, Wild (Calla palustris)
L EAF S POT . Cercospora callae, MA, NY, WI;
Marssonina callae, NY.
Botryosphaeria
ribis, MS;
Phomopsis sp., FL.
C ANKER , Felt Fungus. Septobasidium
castaneum; S. conidiophorum; S. pseudope-
dicellatum, SC.
D ODDER . Cuscuta sp.
G ALL , Leaf. Exobasidium camelliae, and var.
gracilis on Camellia sasanqua , FL, LA, MS,
TX; E. monosporum, AL.
L EAF S POT . Cercospora sp., GA; C. theae, LA;
Hendersonia subalbicans,GA;Pestalotia
quepini, also twig blight, widespread;
Phyllosticta camelliae and P. camelliaecola,
Southeast; Sporonema camelliae.
L EAF S POT , Algal. Cephaleuros virescens, Gulf
states.
N EMATODE , Burrowing. Radopholus similis, FL.
N EMATODE , Lesion. Pratylenchus coffeae.
N EMATODE , Ring. Criconemoides komabaensis,
FL; Hemicriconemoides gaddi, GA, LA.
N EMATODE , Root Knot. Meloidogyne incognita.
N EMATODE , Spiral. Helicotylenchus nannus.
N ONPARASITIC . Bud Drop, Dieback. Malnutri-
tion, freezing, desiccation, widespread.
Oedema. Corky excrescences, from disturbed
water relations.
Sunscald. Light circular spots, often with sec-
ondary fungi.
R OT ,
Calliandra (False-Mesquite)
R OT , Root. Clitocybe tabescens, FL.
R UST . Ravenelia reticulatae (II, III), AZ.
Callicarpa (Beauty-Berry; French-
Mulberry)
B LACK M ILDEW . Meliola cookeana, FL, LA.
L EAF S POT . Cercospora callicarpae, SC to TX.
N EMATODE , Burrowing. Radopholus
similis,
FL.
Calycanthus (Sweetshrub, Carolina
Allspice)
B ACTERIAL
Crown
Gall.
Agrobacterium
tumefaciens, MS, NY.
C ANKER . Botryosphaeria calycanthi, NC, VA.
P OWDERY M ILDEW . Phyllactinia corylea, CA.
Camass (Camassia)
Root.
Phytophthora
cinnamomi,
B LIGHT , Gray Mold. Botrytis cinerea, OR.
L EAF S POT . Septoria chlorogali, OR.
R OT , Root. Phymatotrichum omnivorum, TX.
S MUT , Leaf. Urocystis colchici, IN, OR.
major
problem, AL,
CA; Clitocybe
tabescens, FL, LA.
S POT A NTHRACNOSE , Scab. Elsino¨ leucospila,
FL, GA, LA.
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