Photo and text used courtesy Clemson University
Cooperative Extension Service.

The main symptoms are brown discolorations of the vescular tissue in the stem (see picture) and gradual yellowing and wilting of the entire plant. This fungus survives in the soil for many years. At least two races of the fungus are present in the United States.

Many of the newer tomato varieties show good resistance to Race 1. However, not all existing tomato varities have this resistance. Many other plants are affected by forms of Fusarium sp., but the form that attacks tomato is specific to tomato.