White Rot

• circleYellowing and wilting of foliage, especially on onions and garlic
• circleFluffy white fungal growth around the base and roots
• circleSmall black sclerotia embedded in the white growth and rotted bulb tissue

Caused by the soil-borne fungus Sclerotium cepivorum, which can persist as sclerotia in soil for many years and is triggered into growth by chemical signals from allium roots.

There is no effective treatment once plants are infected; remove and destroy affected plants and surrounding soil where practical to limit sclerotia buildup.

Avoid growing alliums in known infected ground for as long as possible, use certified clean sets or seed, and avoid moving contaminated soil between growing areas.