Cattleya Yellow Blotches with White Powder: Leaf Spot Disease

Yellow Spots + White Powder Underneath = Fungal/Bacterial Leaf Spot

On Cattleyas, this combination typically indicates a leaf spot pathogen.

Immediate Action

1. Remove entire infected leaf—cut at base.
2. Use a new sterile cutter for each leaf—sap on blades spreads disease.
3. Avoid touching healthy tissue with infected leaf or tools.
4. Discard removed leaves in trash (not compost).

Prevention

• Water in mornings so leaves dry by night.
• Ensure good air circulation.
• Isolate affected plants during treatment.

Early, ruthless removal stops spread. Cattleyas recover well if caught early.