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List of garden plant diseases : Onion white rot

Onion white rot damage

Onion white rot damage

Onion white rot is a serious disease of onions in some gardens. It is soil-borne, rotting the roots and making the bulbs unusable. On a badly infected site, every plant will be lost.
To keep out the disease, avoid planting onion sets – use seed instead.

If the disease is already in a part of the garden do not grow onions there, and avoid transferring soil on tools and boots to other parts. A seed dressing with Systemic Fungicide may work but the best solution is to avoid infected ground. Destroy all affected plants by burning.


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