The first symptom observed is the splitting of the basal plate. Secondary growth of the affected bulb often occurs as one to several small bulbs protruding from the split basal plate.

The basal plate of the onion bursts and becomes corky. The symptoms are similar to those of late or excess applications of nitrogen. The split or cracked onions are unmarketable.

The symptoms are similar to those of late or excess applications of nitrogen. The basal plate of the onion bursts and becomes corky. The split or cracked onions are unmarketable.