Allium carinatum · Bulb
Allium leaf miner: Remove and burn affected foliage immediately; lift bulbs in autumn to break the life cycle.
Onion fly: Use insect-proof netting from early spring; avoid planting near previous onion crops.
Onion white rot: Remove infected plants and soil immediately; rotate with non-alliums for at least seven years.
Onion downy mildew: Ensure good air circulation and avoid overhead watering; remove severely affected leaves.
Bulb rot: Plant in well-drained soil or containers; avoid watering during dormancy.