Fusarium Foot rot

Fusarium foot rot symptoms are similar to those of Buckeye root rot, and first appear on mature plants as interveinal chlorosis and necrosis of the leaves. In severe cases, leaves turn brown and collapse, and the entire plant may die. Reddish dark brown lesions form on the taproot and main lateral roots up to 30 cm (12 in.) below the soil-line. Internal vascular discoloration may extend 2-10 cm (1-4 in.) beyond the lesions.

This fungus can survive in the soil for 2-3 years. Cooler temperatures favor disease development, even though the fungus can grow well at a soil temperature of 27°C (81°F). Infection can occur through wounds in the plant roots.