List of poinsettia diseases
This article is a list of diseases of poinsettia (Euphorbia pulcherrima).
Bacterial diseases[]
Disease | Cause | Image |
---|---|---|
Bacterial leaf spot | Curtobacterium flaccumfaciens = | |
Bacterial leaf spot | Pseudomonas cichorii | |
Bacterial leaf spot | Pseudomonas marginalis |
|
Bacterial leaf spot | ||
Bacterial leaf spot | ||
| ||
Erwinia chrysanthemi | ||
Crown gall | Agrobacterium tumefaciens | |
Pseudomonas viridiflava |
Fungal diseases[]
This also includes oomycetes
Nematodes, parasitic[]
Disease | Cause | Image |
---|---|---|
root-knot nematode | Meloidogyne spp. |
|
Viral and viroid diseases[]
Disease | Cause | Image |
---|---|---|
mosaic | Euphorbia mosaic virus | |
mosaic | Poinsettia mosaic virus | |
(symptomless) | Poinsettia latent virus |
Miscellaneous diseases and disorders[]
Miscellaneous diseases and disorders | |
---|---|
Air pollutant injury from either chlorides (> 0.5 ppm), nitrogen dioxide (> 2-3 ppm) or sulfur dioxide (> 0.5 ppm) | |
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 |
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 |
Magnesium deficiency, initiating on older leaves Manganese deficiency, initiating on young mature leaves | |
High internal turgor pressure associated with certain cultivars, high humidity, high moisture availability, low temperatures and/or mechanical abrasion | |
(bronzing) | Peroxyacetyl nitrate (PAN) injury to the lower epidermis
(> 0.2 ppm) |
Potassium deficiency
Fluoride toxicity on tips and margins of young leaves and bracts (0.4 ppm in water) | |
Physiological expression of flower initiation | |
Stippling | Ozone injury (> 4 ppm) |
Excessive soluble salts (> 800 EC X 102) | |
Chilling injury occurring between 0–10 °C (32–50 °F) |
References[]
- "Diseases of Poinsettia". Common Names of Diseases, The American Phytopathological Society]
Categories:
- Lists of plant diseases
- Ornamental plant pathogens and diseases