Soft rot has no odor. Controls include using disease-free seed, preventing bruising of tubers, treating and suberizing seed pieces, warming seed and practicing good sanitation. Areas of infection are cream to dark tan with a distinct, dark border between healthy and infected tissue. The rotted tissue is soft, mushy and can be easily be rinsed away with water. The bacteria is soilborne and spread by contact.
Soft rot has no odor.
It is soil- and seedborne. It produces lesions which are fawn to dark chocolate brown. The rotted tissue is relatively firm. As the lesions age, the tissues become dry and punky, and may contain areas that are yellow, pink or orange. Other controls include preventing wounding at harvest, treating tubers with fungicide, allow tubers to suberize and then storing at low temperatures.