Cymbidium Bulb Rot: Bacterial Infection & Emergency Surgery

Recognizing Bacterial Rot in Cymbidiums

During the wet season in the Philippines, Cymbidium bulbs become soft, smelly, and discolored (black/purple at bases). This is likely bacterial rot, not virus. Untreated, it spreads through the pot, killing all bulbs.

Immediate Action Required

1. Unpot affected plants immediately.
2. Remove bulbs until no black/purple discoloration remains at the base of remaining bulbs.
3. Sterilize cutting tools between each cut: heat blades with a propane torch until red-hot, or use single-edged razor blades (discard after one cut).
4. Repot healthy divisions in fresh, well-draining mix.

Isolate treated plants. Monitor remaining pots for early signs. Quick, clean surgery saves the collection.