How to Manage Pests

Pests in Gardens and Landscapes

Powdery mildew—Erysiphe cichoracearum

Powdery mildew usually appears first as yellow spots on the upper leaf surface of older leaves; these spots develop the characteristic powdery growth and symptoms spread to the undersides of leaves and stems. Affected leaves may turn completely yellow and die.

Identification

Solutions

Powdery mildew rarely becomes serious enough to require treatment.

For more information, see the Powdery Mildew Pest Note.

Powdery growth of powdery mildew
Powdery growth of powdery mildew

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