Bacterial Soft Rot in Calla Lilies

Slimy Collapse from the Base

Progressive yellowing, slimy dissolution from the base upward, with no visible pests, indicates bacterial soft rot (Erwinia carotovora var. aroideae).

Management

• Dig up and discard affected plants and corms.
• Do not replant callas in the same spot.
• Treat dormant corms with antifungal powder before planting.
• Improve drainage and avoid overhead watering.

The disease spares feeding roots initially but eventually kills the entire plant.