Diagnosing Black Spots and White Scale on Cymbidium

Cymbidium Leaf Issues: Fungus and Scale

A Cymbidium has small black spots on leaf tips and white spots near leaf bases.

Black Spots

Tiny tip spots are often cold-induced (below 40°F) or fungal. If spots appear on both leaf sides, it's likely fungus—not usually fatal unless at the leaf base, where it can rot pseudobulbs.

White Spots

White spots at leaf bases suggest boisduval scale. Treat with an imidacloprid-based insecticide, drenching plant and pot. Repeat 3 times over 3 weeks. Monitor for recurrence; scale is persistent.