Cineraria Diseases

Informational table showing disease name, symptoms, pathogen/cause, and management of Cineraria diseases.
Cineraria Diseases - Articles

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DiseaseSymptomsPathogen/CauseManagement
Alternaria Leaf SpotDark brown to black spots form on leaves. These enlarge to engulf large portions of the leaf. Spots on petioles may allow them to break.Alternaria sensecionisRemove infected leaves. Water in a manner that keeps leaf surfaces dry. Maintain low humidity. Apply a fungicide to protect healthy plants.
Downy MildewYellow spots on leaves become black. Sparse fungal growth may appear on the underside of infected leaves.Plasmopara halstediiWater in a manner that keeps leaf surfaces dry. Remove infected leaves.
Phytophthora Root and Collar RotRoots and stem at the soil line rot. Plants wilt and die.Phytophthora cinnamomi, P. cryptogea, P. megasperma, and P. drechsleriPlant in pasteurized potting mix. Apply a fungicide to protect healthy plants.
Powdery MildewWhite fungal growth forms on the leaf surface.Golovinomyces cichoracearum (formerly Erysiphe) or Sphaerotheca fuscaHeat and ventilate to maintain low humidity at night. Apply a fungicide to protect healthy plants.
VirusesLeaves may be mottled, have yellow spotting, dead flecks, line or ring spot patterns. Plant may be distorted, have flower color breaking, or may be stunted. Veins may be killed along with petioles and the entire plant.Impatiens necrotic spot, streak and mosaic viruses.Destroy infected plants. Maintain good thrips and mite control.


Leaf spot


Leaf spot


Impatiens necrotic spot virus infection symptoms on leaves and stem.

Prepared by Gary W. Moorman, Professor of Plant Pathology

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