To date, there are no known resistant varieties. Root and Crown Rot Complex Caused by Fusarium Spp. Root rots are major factors in limiting production of forage legumes. Several different soil-borne fungi may attack roots. Most commonly found are species of Fusarium.
Initial symptoms appear on the leaves, which curl and then turn gray and wilt.
The tap root is frequently discolored, light brown to black, and can become completely rotted. New roots are attacked as rapidly as they replace older damaged roots. Root rot fungi enter roots through wounds caused by soil insects, winter injury, or mechanical injury. Maintain proper potassium and phosphorus levels to promote root growth. Avoid mechanical injury as much as possible, control insects, and maintain proper cutting schedules.