How to Manage Pests

Pests in Gardens and Landscapes

Verticillium wilt—Verticillium dahliae

Verticillium wilt becomes evident when lower leaves on the vine turn yellow and wither. Symptoms progress upward until the entire plant yellows and wilts. Vascular tissue of stems becomes a light brown, which is best observed near ground level. Some tubers from infected plants may develop a light brown discoloration in the vascular ring near the stem end. Wilt causes early senescence of plants in heavily infested fields.

Life cycle

Solutions

Verticillium wilt is caused by a soilborne fungus. Avoid soil previously planted with tomatoes, peppers, eggplant, or cucurbits. Rotate out of these susceptible crops and potatoes for 2 or 3 years. Legumes are good rotation crops. Following good sanitation practices and using soil solarization may help minimize problems. Some varieties are more tolerant than others.

 

Yellow leaves of infected plant
Yellow leaves of infected plant
Wilt in stem tissue
Wilt in stem tissue
Discolored tuber
Discolored tuber

 


Statewide IPM Program, Agriculture and Natural Resources, University of California
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