Allium flavum · Bulb
Slugs and snails: Use physical barriers like copper tape or apply iron phosphate pellets around the base.
Vine weevil: Apply nematodes to the soil in autumn or use biological controls for larvae.
Powdery mildew: Improve air circulation and spray with a sulphur-based fungicide if severe.
Bulb rot: Ensure well-drained soil and avoid overwatering to prevent waterlogging.
Rust: Remove affected foliage and improve airflow around plants.