Mountain Laurel Leaf Spot: Cercospora Identification and Control

Disease Reference Table

Disease	Symptoms	Pathogen/Cause	Management
Leaf Spot	Large tan to brown spots on leaves with dark line on perimeter and purple halo. Dark-brown pimple-like fruiting structures scattered within spot.	Cercospora kalmiae	Avoid overhead irrigation. Apply fungicide.

Cercospora leaf spot; Virus symptoms on Kalmia (virus identity unknown).

Plant Disease: Mountain Laurel Leaf Spot: Fungus Management After Pruning; Texas Mountain Laurel Expert Referral; Mountain Laurel with Broken Stem: Stabilization Usually Fails; Mountain Laurel Memories: A Flower of Love and Legend in the Appalachians; Catharanthus (Annual Vinca) Disease Control: Botrytis and Phytophthora Management; Kalanchoe Disease Management: Phytophthora, Powdery Mildew, and Viral Control; Schefflera (Brassaia) Disease Guide: Fungal, Bacterial, and Environmental Disorders; Hickory Leaf Spots: Symptoms and Management; Mountain Ash Diseases: Cankers, Fire Blight, and Leaf Spot; Mountain Laurel Care: Organic Fertilizer and Selective Pruning

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