Onion white rot (Latin name – Sclerotium cepivorum) affects onions, spring onions, leeks, & chives.
Symptoms of onion white rot:
* plants die * onion leaves wilt & collapse * bulbs rot at the base and are covered with a fluffy white mould.
Cause of onion white rot
* a fungus * spreads from plant to plant by contact between roots and bulbs * can live in the soil for up to 15 years * very difficult to eradicate from the soil
Prevention of Onion white rot
* rotate onion family so only grow every three or four years * do not grow onion family in soil contaminated with onion white rot