It is also helpful to provide good ventilation and plenty of light since these will decrease the chance of spreading the fungus. Heavily infected bulbs should probably be discarded. Bulb rot , Penicillium, Fusarium . This disease often develops during storage and is frequently associated with mechanical injury or damage from mites. Infection is favored by moist conditions.
Control is achieved through careful digging to avoid wounding.
It is also helpful to control insect and mite pests. Infected bulbs should be destroyed. This is one of the most widespread and common disease of bulbs. Symptoms are variable and can appear as oval or circular spots which are initially reddish-brown and develop pale centers and purplish margins. These spots may run together and rot the entire leaf.