Infected bulbs have a strong odor and are soft and mushy. Since this pathogen is highly contagious, all infected bulbs should be discarded. It is helpful to carefully remove any symptomatic foliage and plant debris in the fall after the tops have been killed by frost. Bulbs should be planted in well-drained soil and watered early in the day. This disease can also be minimized by avoiding overcrowding and wounding during cultivation.
Sanitation is also very important.
It is also helpful to control insects and mites since injuries associated with their activity provide sites for infection. Insect Problems See Bulbs .