Onion white rot

Identifying Features
Leaves wilt and turn yellow. In wet conditions the plant may not wilt, but can become loose in the soil. When plants are lifted; white fluffy growth can be found on the base.

Treatment
Remove and destroy affected plants. Do not grow other alliums] on the same site for another 8 years. This fungus survives in the soil for a very long time. There is currently no chemical control.