Do not confuse with:
Onion white rot (Stromatinia cepivora, syn. Sclerotium cepivorum)
Tulip rot (Sclerotium perniciosum). This fungus affects tulips, allium species and fritillaries (snake’s heads). Around flowering time, the plant wilts, the leaves turn purple-red and the stem becomes limp and turns gray at ground level. The bulb then rots quickly and is covered by a gray layer of fungus.
The fungus is quite rare and is particularly common on clay and loams. The fungus starts in one spot and slowly spreads. In sandy soil, fungus thrives poorly.
Where to find
- Tulip
- Allium species
- Fritillaries (snake’s heads)
Control
Remove affected tulips with the soil; do this liberally.
