Fusarium wilt causes a dark brown discoloration within the vascular tissue. Fusarium crown rot causes a rot or canker at the base of the stem and possibly a root rot. However, if vascular discoloration is noted during the diagnostic process, pull and destroy affected plants. Do not plant tomatoes, potatoes or eggplant in the affected area for two or three years. No fungicides are labeled for control.
Symptoms begin with lower leaves turning downward.
Dark to light brown streaks may develop on the leaf midribs and eventually extend down the petiole to form a canker on the stem. There may be vascular discoloration. This disease is difficult to distinguish from other tomato diseases and may need laboratory confirmation. If identified, destroy the plants. Do not compost plant material.