Allium cyaneum · Bulb
Slugs and snails: Use copper tape barriers, beer traps, or iron phosphate-based pellets to control populations.
Powdery mildew: Ensure good air circulation and apply a sulphur-based fungicide if infection is severe.
Bulb rot: Plant in well-draining soil and avoid waterlogging to prevent fungal or bacterial decay.
Vine weevil: Apply nematode treatments in autumn or use systemic insecticides to target larvae.