G. W. Simone, primary collator (last update 11/08/00)
BACTERIAL DISEASES
- Bacterial leaf spot
- Curtobacterium flaccumfaciens
(Hedges 1922) Collins and
Jones 1984
- = Corynebacterium flaccumfaciens
pv. poinsettiae
(Starr & Pirone 1942) Dye & Kemp 1977
- Pseudomonas cichorii
(Swingle 1925) Stapp 1928
- Ps. marginalis
(Brown 1918) Stevens 1925
- Ps. syringae
subsp. syringae van Hall 1902
- Xanthomonas campestris
pv. poinsettiaecola (Patel et al.
1951) Dye 1978
- Bacterial stem rot
- Erwinia carotovora
subsp. carotovora (Jones 1901) Bergey
et al. 1923
- Erwinia chrysanthemi
Burkholder et al. 1953
- Crown gall
- Agrobacterium tumefaciens
(Smith and Townsend 1907) Conn 1942
- Greasy center
- Pseudomonas viridiflava
(Burkholder 1930) Dowson 1939
FUNGAL DISEASES
- Anthracnose
- Colletotrichum capsici
(Syd.) E.J. Butler & Bisby
- Colletotrichum dematium
(Pers.) Grove
- Glomerella cingulata
(Stoneman) Spauld. & H. Schrenk
- C. gloeosporioides
(Penz.) Penz. & Sacc. in Penz.
[anamorph]
- Aerial blight
- Ceratobasidium ramicola
Tu, D.A. Roberts & Kimbrough
- Rhizoctonia ramicola G.F. Weber & D.A. Roberts
[anamorph]
- Basal stem and crown rot
- Sclerotinia sclerotiorum
(Lib.) deBary
- Basal stem and root rot
- Ceratocystis
sp.
- Thielaviopsis basicola (Berk. & Broom) Ferraris
[anamorph]
- Chalara elegans
Nag Raj & Kendrick [synanamorph]
- Black rot
- Botryodiplodia
sp.
- Bract, flower and leaf blight
- Phytophthora drechsleri
Tucker
- Bract spot
- Corynespora cassiicola
(Berk. & M.A. Curtis) C.T. Wei
- Crown and stem rot
- Fusarium oxysporum
Schlechtend.:Fr.
- Nectria haematococca
Berk. & Broome
- Fusarium solani (Mart.) Sacc. [anamorph]
- Cutting rot
- Cylindrocladium scoparium
Morgan
- Dieback
- Lasiodiplodia theobromae
(Pat.) Griffon & Maubl.
- =Botryosphaeria theobromae Pat.
- Gray mold
- Botryotinia ricini
(Godfrey) Whetzel
- Amphobotrys ricini (Buchwald) Hennebert [anamorph]
- =Botrytis ricini
- Botryotinia fuckeliana
(deBary) Whetzel
- Botrytis cinerea Pers.:Fr. [anamorph]
- Leaf necrosis
- Cladosporium
sp.
- Macrophoma
sp.
- Leaf spot
- Alternaria euphorbiicola
E. Simmons & Engelhard
- Ascochyta
sp.
- Cercospora pulcherrimae
Tharp
- Curvularia
sp.
- Drechslera
sp.
- Myrothecium roridum
Tode:Fr.
- Phyllosticta
sp.
- Syspastospora parasitica
(Tul.) P. Cannon & D. Hawksworth
- = Melanospora parasitica (Tul.) Tul. & C. Tul.
- Stemphylium
sp.
- Mushroom root rot
- Armillaria tabescens
(Scop.) Dennis, Orton & Hora
- Powdery mildew
- Oidium
sp.
- Erysiphe
sp.
- Microsphaera euphorbiae
Berk. & M.A. Curtis
- Root rot
- Phytophthora nicotianae
Breda de Haan
- = P. nicotianae var. parasitica (Dastur) G.M. Waterhouse
- Pythium aphanidermatum
(Edson) Fitsp.
- P. debaryanum
Auct. non R. Hesse
- P. myriotylum
Drechs.
- P. perniciosum
Serbinow
- P. splendens
H. Braun
- P. ultimum
Trow
- Root and stem rot
- Thanatephorus cucumeris
(A.B. Frank) Donk
- Rhizoctonia solani
Kühn [anamorph]
- Rust
- Puccinia
sp.
- Uromyces euphorbiae
Cooke & Peck in Peck
- = U. proeminens Pass. In Rabenh. var. poinsettiae
(Tranzschel) Arth.
- Scab
- Sphaceloma poinsettiae
Jenk. & Ruehle
- Stem gall
- Nectriella pironii
Alfieri & Samuels
- Kutilakesa pironii Alfieri [anamorph]
- Stem rot
- Botryosphaeria ribis
Gross. & Duggar
- Diplodia
sp.
- Leptothyrium
sp.
- Phoma
sp.
- Phomopsis
sp.
NEMATODES, PARASITIC
- Root knot nematode
- Meloidogyne
spp.
VIRAL and VIROID DISEASES
- Mosaic
- genus Bigeminivirus, Euphorbia mosaic virus (EuMV)
- Poinsettia mosaic virus (possible tymovirus) (PnMV)
- (symptomless)
- Poinsettia (?) alphacryptovirus (PnCV)
MISCELLANEOUS DISEASES and DISORDERS
- Bleaching necrosis
- Air pollutant injury from either chlorides (> 0.5 ppm), nitrogen dioxide (> 2-3 ppm) or sulfur dioxide (> 0.5 ppm)
- Bract necrosis
- Physiological disorder favored by high humidity, heavy watering and high (ammoniacal) fertility rates in the last 4 weeks of production
- Chlorosis
- Nitrogen deficiency producing a general foliar yellowing
- Molybdenum deficiency affecting mature young leaves and
producing upward leaf roll
- Sulfur deficiency causing young leaf yellowing
- Zinc deficiency producing general yellowing and stunting of
new leaves
- Cyathia drop
- Response to low light conditions, dryness and/or high temperatures at the end of the production cycle
- Dropping (epinasty)
- Ethylene toxicity (< 1 ppm) or low temperature chilling
- Edema
- Physiological
- Interveinal chlorosis
- Magnesium deficiency, initiating on older leaves
- Manganese deficiency, initiating on young mature leaves
- Ammonium toxicity produces V-shaped chlorotic bands
starting at the leaf tip and accompanied by downward leaf
cupping
- Latex eruption
- High internal turgor pressure associated with certain cultivars, high humidity, high moisture availability, low temperatures and/or mechanical abrasion
- Leaf glazing (bronzing)
- Peroxyacetyl nitrate (PAN) injury to the lower epidermis
- (> 0.2 ppm)
- Marginal necrosis
- Potassium deficiency
- Fluoride toxicity on tips and margins of young leaves and bracts
(0.4 ppm in water)
- Lithium toxicity on older leaves (2 ppm)
- Stem splitting
- Physiological expression of flower initiation
- Stippling
- Ozone injury (> 4 ppm)
- Terminal shoot necrosis
- Excessive soluble salts (> 800 EC X 102)
- White bract
- Chilling injury occurring between 0-10°C (32-50°F)
