How to Manage Pests

Pests in Gardens and Landscapes

Pest identification and confirmation—Fusarium and Verticillium wilt

Both Fusarium and Verticillium wilt cause leaf yellowing and discoloration of the water-conducting tissues of the plant. Cut affected plants at the base of stems and examine them in cross section to see the browning of the water-conducting tissue compared to the healthy ivory of uninfected plants. Verticillium and Fusarium discoloration are extremely difficult to distinguish, although Fusarium discoloration tends to be darker. Fusarium tends to occur more in warmer soils and Verticillium in cooler ones. Management for both requires resistant varieties.

Fusarium wilt
Fusarium wilt
Verticillium  infected
Verticillium infected

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

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