How to Manage Pests

Pests in Gardens and Landscapes

Flower blight—Ovulinia azaleae

Flower blight causes small round to larger spots on flowers. Flowers collapse, become soft, and cling to leaves or stems. The fungus that causes flower blight is favored by cool, wet weather. Spores are spread by splashing water.

Solutions

Remove and dispose of diseased blossoms. Remove debris from the base of plants or pots in order to reduce inoculum. Prune to improve air circulation and remove lower branches where infections first occur. Do not use overhead sprinklers. In rainy areas, applying a fungicide such as triforine prior to budbreak may help prevent this disease.

Flower blight on azalea
Flower blight on azalea


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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