The symptoms of verticillium are very similar to Fusarium. Leaves turn yellow, brown and wilt. The entire plant will eventually succumb. There is no treatment or cure.
Avoid overwatering and adding too much fertilizer. Plant in raised areas in well drained soil. Purchase plants that are verticillium resistant (usually has the letter “V” on the label). Rotate crop locations.
Source: http://ipm.ucanr.edu/PMG/GARDEN/PLANTS/DISEASES/vertwilt.html