How to Manage Pests

Pests in Gardens and Landscapes

Seasonal development and life cycle—Verticillium wilt

Verticillium dahliae survives for years in soil as tiny, dormant sclerotia. The pathogen has a wide host range including many vegetable crops, weeds, and trees. When roots of susceptible crops grow in close proximity, sclerotia germinate and infect the roots. Verticillium wilt is most severe during relatively cool periods and subsides during the hottest part of the summer, but wilting is usually seen during warm dry periods when the plant is under stress, such as after fruit set. The pathogen grows in the water-conducting tissue, causing plugging and interference with water transport.

Vascular discoloration of pepper roots
Vascular discoloration of pepper roots


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