Verticillium Wilt: Identification and Management

Verticillium wilt is a widespread, destructive fungal disease. The fungus invades and blocks water-conducting tissues in roots and stems. A classic symptom is wilting on one side of the plant. Leaves turn yellow, then brown, and eventually die. Many plants are susceptible, including tomatoes, potatoes, cotton, strawberries, and melons. These crops often leave the soil infested, and the fungus can survive for years without a host. Even crop rotation may not eliminate it.

Best Defense: Resistant Varieties

Choosing resistant plants is the most effective strategy. Numerous resistant trees, shrubs, flowers, bulbs, and vegetables are available; contact your local Cooperative Extension Office for a list suited to your area. Plants resistant to verticillium wilt are often also resistant to fusarium wilt.

Chemical Control

If the problem is severe, professional soil fumigation may be necessary. This should only be performed by a certified professional.