Fusarium wilt and corm rot of cyclamen is caused by Fusarium oxysporum f.sp.cyclaminis. Symptoms appear at any stage of plant growth and are dependent on both inoculum levels and growing conditions. The leaves exhibit yellow patches and wilt one after another until the entire plant collapses. A distinctive symptom is the purple, reddish-brown to black vascular discoloration of the corm, which remains firm unless it is invaded by secondary bacteria. Root rot may also occur.
There are no resistant cyclamen cultivars and chemical controls are not entirely effective. Sanitation and pasteurization of soil-containing media are recommended for management.