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Cyclamen Diseases

Name: Cyclamen Diseases
SKU: ART-3531

Informational table showing disease name, symptoms, pathogen/cause, and management of Cyclamen diseases.

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Updated:

July 5, 2023

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Disease	Symptoms	Pathogen/Cause	Management
Bacterial Soft Rot	Yellowing plants wilt and die rapidly. Corms have a wet, soft rot.	Erwinia carotovora or Erwinia chrysanthemi	Plant only healthy, sound corms. Discard infected plants. Plant in pasteurized media.
Botrytis Blight	Leaf spots become tan in color. Flower petal spots are at first water-soaked but become tan. Infected crowns, petioles, and developing flowers are covered with gray fungal growth.	Botrytis cinerea	Reduce the humidity in the greenhouse. Space plants to insure good air circulation. Apply a fungicide to protect healthy plants.
Fusarium Wilt	Infected plants become very yellow. Vascular tissue in the corm turns dark brown to black. Mature plants wilt and die.	Fusarium oxysporum f. sp. cyclaminis	Plant sound, disease-free corms in pasteurized media. Discard infected plants.
Leaf Spot	Yellow or brown or gray circular spots develop on leaves and may have a zonate pattern within them. Small dark brown dots can be seen within the spots.	Septoria, Gloeosporium, or Phyllosticta	Water plants in a manner that does not wet the leaves. Apply a fungicide to protect healthy plants.
Pythium Root Rot	Young plants die. Stunting and root rot occurs on older plants.	Pythium	Plant in pasteurized media. Keep hose ends off the ground. Discard infected plants.
Thielaviopsis Root Rot	Stunted plants have blackened roots.	Thielaviopsis basicola	Plant in pasteurized media. Discard infected plants.
Viruses	Flowers may be abnormal in shape. Leaves are deformed and streaked with yellow or brown markings or have ringspots in a thumb-print like pattern.	Tobacco mosaic, cucumber mosaic, tobacco rattle, tomato aspermy, potato virus X, impatiens necrotic spot	Discard infected plants. Maintain good aphid and thrips control. Wash hands thoroughly and frequently when handling plants to prevent mechanical spread.